2 . 在乒乓球锦标赛上，他连续打出了几个高难度的弧圈球，让对手难以招架。(形式主语)
In the Table Tennis Tournament, he played several high difficulty loop balls ________________ and ________________.

3 . 大家公认海洋在地球上起着至关重要的作用。
________ the ocean plays a key role in our planet.

4 . Although I have been working hard, I can’t keep up with others, and this bothers me greatly. (同义句转换)
→Although I have been working hard, ________ I can’t keep up with others. (it作形式主语)
→Although I have been working hard, ________ I can’t keep up with others. (what引导主语从句)

7 . 人们突然明白了，当钟表大师们说“这些古董有生命”时，既不是夸大其词，也非比喻。
________________ when the clock masters say that “these antiques have lives”, it is neither an exaggeration nor a metaphor.

8 . Evidently, James has made a mistake in his job, but don’t scold him; he is a green hand.(同义句转换)
→________________ James has made a mistake in his job, but don’t scold him; he is a green hand.(it作形式主语)

9 . 大人从来没法自己弄懂任何事情，小孩总是没完没了地向他们解释是很烦的。
Grown­ups never understand anything by themselves, and ________________.

10 . 难怪有人说中国人民抗日战争的伟大胜利将永远铭刻在人类正义事业史册上。
________________ someone says that the great victory of the Chinese people's war of resistance against Japan will be forever engraved in the history of human justice.