As our Earth’s temperature warms up because of climate change, it is having unexpected effects on our world’s forests. When temperatures rise, trees close their skins to    1    the loss of water, and this, in turn, slows down the    2    of photosynthesis(光合作用). As a result, these trees are shorter and grow slowly, as well as have a    3    death rate.

Climate change also increases the    4    of droughts and wildfires. After wildfires, it takes a while for the forest systems to    5    , and in some cases, the forests are    6    permanently. Trees that are stressed are also    7    to attacks by bacteria(细菌). In tropical forests, vines that use the trees as    8    can often choke the trees and rob them of nutrients. Finally, humans have    9    the forest landscape through logging. When trees are replanted on the soil, they will never grow as large as the    10    trees that were cut down.

As these forests disappear, species that once called them “home” are forced to change,    11    the variety of those systems.    12    , some endangered species are unable to    13    and die. Old-growth forests are disappearing in all regions of our world. When forests die, younger forests that are reestablished in the same area grow back weaker and smaller    14    poor vegetation. With trees dying increasingly and continuously, will future generations    15    out on the wonders of forests?

1．A．protect              B．prevent                   C．save                       D．free

2．A．movement         B．situation                 C．process                   D．operation

3．A．higher              B．firmer                    C．lighter                    D．smaller

4．A．choice              B．measure                  C．qualification           D．chance

5．A．grow                B．rescue                    C．recover                  D．decline

6．A．ignored             B．lost                        C．hurt                       D．left

7．A．accessible          B．enjoyable                C．acceptable              D．favorable

8．A．attention           B．command               C．trust                       D．support

9．A．frightened         B．paid                       C．ruined                    D．wasted

10．A．common         B．original                  C．distant                    D．strong

11．A．affecting         B．improving              C．forgetting               D．reflecting

12．A．Besides           B．Surprisingly            C．Otherwise               D．Unfortunately

13．A．devote            B．keep                       C．adapt                     D．lead

14．A．due to             B．in addition to          C．instead of               D．in spite of

15．A．pass                B．miss                       C．break                     D．bring

Online shopping is coming into fashion in most cities, where people are able to make full use of the rapidly-developed internet technology. Nowadays, can we find a person16．hasn’t experienced online shopping? Definitely not.

Online shopping17．(welcome) by most people due to various reasons. From the perspective of consumers, it can save some time for people who don’t have much spare time. Just click the mouse, they can get18．they want while staying at home. For the retailers, it can cut some costs for those who don’t have enough circulating funds.19．(compare) with the traditional trade mode, they don’t have to spend money in renting a house.20．, there are still some disadvantages in online shopping. First, a face-to-face deal makes online shopping less reliable and trustworthy. Second, people will lose21．fun of bargain.

22．is undeniable that shopping on the internet has become an irresistible trend in modern society. It’s23．great urgency that we need to make the relative laws24．the rapid growth of online shopping. Only in this way can we enjoy the pleasure and25．(convenient) of online shopping without the concern of being cheated.

There has been a recent trend in the food service industry toward lower fat content and less salt. This trend, which was started by the medical community(医学界) 26． a method of fighting heart disease, has had some unintended side 27．(effect) such as overweight and heart disease — the very thing the medical community was trying to fight.

Fat and salt are very important parts of a diet. They are required 28．(process) the food that we eat, to recover from injury and for several other bodily functions. When fat and salt 29．(remove) from food, the food tastes as if is missing something. As 30． result, people will eat more food to try to make up for that something missing. Even 31．(bad), the amount of fast food that people eat goes up. Fast food 32．(be) full of fat and salt; by 33．(eat) more fast food people will get more salt and fat than they need in their diet.

Having enough fat and salt in your meals will reduce the urge to snack(吃点心) between meals and will improve the taste of your food. However, be 34．(care) not to go to extremes. Like anything, it is possible to have too much of both, 35． is not good for the health.

Few people I know seem to have much desire or time to cook. Making Chinese 36．(dish) is seen as especially troublesome. Many westerners 37． come to China cook much less than in their own countries once they realize how cheap 38． can be to eat out. I still remember 39． (visit) a friend who’d lived here for five years and I 40．(shock) when I learnt she hadn’t cooked once in all that time.

While regularly eating out seems to 41．(become) common for many young people in recent years, it’s not without a cost. The obvious one is money; eating out once or twice a week may be 42．(afford) but doing this most days adds up. There could be an even 43． (high) cost on your health. Researchers have found that there is a direct link between the increase in food eaten outside the home and the rise in 44．(weigh) problems.

If you are not going to suffer this problem, then I suggest that the next time you go to your mum’s home 45． dinner, get a few cooking tips from her. Cooking food can be fun. You might also begin to notice the effects not only on your health but in your pocket.

According to a review of evidence in a medical journal, runners live three years 46．(long) than non-runners. You don't have to run fast or for long47．(see)the benefit. You may drink, smoke, be overweight and still reduce your risk of 48． (die) early by running. While running regularly can't make you live forever, the review says it 49． (be) more effective at lengthening life50． walking, cycling or swimming. Two of the authors of the review also made a study published in 201451．showed a mere five to 10 minutes A day of running reduced the risk of heart disease and early deaths from all 52．(cause).

The best exercise is one that you enjoy and will do. But otherwise…  it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to53．(strength)your leg muscles(肌肉),avoid hills and get good running shoes. Running is cheap, easy and it's always54．(energy).If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give55．a try.