1 . Over time, however,   ____________ some scientists ____________ their long-term use can sometimes harm ____________ the land ____________ people’s health.
然而, 随着时间的推移，一些科学家发现它们的长期使用会造成土地受损，对人们的健康造成危害。

2 . ____________________ (据希望)Sarek National Park will always remain ____________________(照原样),   natural and beautiful. (根据汉语提示完成句子)

3 . 这一想法能否付诸实践还有待观察。(it作形式主语：whether… or… )(汉译英)

5 . 很明显，人类活动对地球上所有其他物种，包括动物和植物都产生了负面影响。 (it作形式主语) (汉译英)

6 . ________ (很显然)he is confident about his life in the future. (根据汉语提示完成句子)

7 . If ________(他在会议上提出的) is passed, we may face a big financial difficulty. (根据汉语提示完成句子)

9 . ________ he can get a nursing qualification remains to be seen. （用适当的词填空）