Ⅰ.单句语法填空
1．That the lifestyle is slower and healthier __is__ the reason why some people prefer to live in the country rather than in the city.
2．__That__ people cut down too many trees destroyed the balance of nature.
3．It was reported __that__ Los Angeles Lakers basketball legend Kobe Bryant was killed in a helicopter crash in Southern California.
4．__Whether__ we can live a healthy life is the first thing we are considering.
5．__How__ we can find a suitable solution to produce sufficient food while keeping the environment safe is an important topic for us to research.
6．__That__ we shall be successful is certain.
7．When these wheat farmers will join this pilot experiment __remains__(remain) an unanswered question.
8．__What__ worries most of us is that the chemicals may even cause cancer.
9．__Who__ will win the match is still unknown.
10．__That__ they should like each other is natural.
