Life is always full of hardships. _______ a better life, we need positive energy.
A. Live B. To live
C. Living D. Lived
B
The biggest problem for most plants, which ________just get up and run away when threatened, is that animals like to eat them.
A. shall not B. can't
C. needn't D. mustn't
B
--- What do you think of a house supplied by Lovell ?
---- _______ you buy a home from Lovell, the company promises to buy it back at the same price after three years.
A. Should B. Must
C. Could D. Would
A
As to the long-term effects of global warming some believe that the damage has been done, ___________________.
A. otherwise we take steps to make up now
B. now that we take steps to make up
C. whether we take steps to make up now or not
D. unless we take steps to make up now
C
A person who has slept well will have a clear mind and work efficiently in the daytime
______ people with sleep disorders find it difficult to concentrate during the day.
A. unless B. while
C. if D. until
B
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