freedom observing circulating worthwhile behave childhood disturbing output equip entertainment expanding shade outspoken struggled export
66. She spent years _________________ and recording their daily activities.
67. Jane has studied these families of chimps for many years and helped people understand how much they _______________ like humans.
68. At that time, hunger was a ________________ problem in many parts of the countryside.
69. He therefore gives millions of yuan to ___________ others for their research in agriculture.
70. Since her _____________ she had wanted to work with animals in their own environment.
71. He is now __________ his knowledge in many less developed countries to increase their rice harvests.
72. She has argued that wild animals should be left in the wild and not used for ___________ or advertisements.
73. Everybody sits and waits in the ____________of the trees while the family begins to wake up and move off.
74. He searched for a way to increase rice harvest without ________________ the area of the fields.
75. Yuan Longping has another dream: to __________ his rice so that it can be grown around the globe.
76. In 1973, he became the first agricultural pioneer in the world to grow rice that has a high __________.
77. For forty years Jane has been _______________ about making the rest of the world understand and respect the life of these animals.
78. Yuan Longping has ______________ for millions of Chinese farmers for the past five decades.
79. He feels it gives him less ___________ to do his research.
80. However, the evening makes it all ____________________.
66. observing 67. behave 68. disturbing 69. equip 70. childhood 71. circulating
72. entertainment 73. shade 74. expanding 75.export 76. output 77. outspoken 78. struggled 79. freedom 80. worthwhile.