1 . _____________Yuan's hybrids made him quite wealthy, one might think he would retire to a life of leisure. However, this is far from the case.
考虑到杂交水稻使袁隆平变得相当富有，人们可能认为他会退休享受闲适的生活。然而，事实远非如此。

2 . Today, _____________about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan's hybrid strains, and his strains have allowed China's farmers to around 200 million tons of rice per year.
现在中国国内消费的稻米有大约60%来自袁隆平的杂交水稻品种形成的作物，这些品种（形成的作物）让中国农民每年能够生产出大约两亿吨稻米。

3 . It has been c______ that the global space economy is to increase by billions of dollars in the years to come. (根据首字母单词拼写)

5 . Is it the first time in a year and a half that Sally ________ (make) such great progress? (所给词的适当形式填空)

7 . I prefer ________ books at home rather than ___ to the cinema on weekends.

A．to read; go

B．to read; to go

C．reading; going

D．reading; to go

8 . ________ (最后但同样重要的), we should call on citizens to take a bus instead of driving a car as much as possible. (根据汉语提示完成句子)