1 . Only then ________ she realize how serious the situation had been. (用适当的词填空)

2 . Only after I had read the poem a second time ________ I make sense of it. (用适当的词填空)

3 . At last he reached the conclusion that something ________ (do) wrong.(所给词的适当形式填空）

4 . Don't leave your work half ________ (do). (所给词的适当形式填空）

5 . If nothing ________ (do), the oceans will turn into fish deserts. （所给词的适当形式填空）

6 . Nancy let me repeat her instruction to make sure that I understood what was_________(do)after she was away on business. (所给词的适当形式填空)

7 . I want to thank the Beijing 2022 organizing committee for the outstanding work they________（do）so far.(所给词的适当形式填空）

8 . 因此，当坐在教室做试卷时，我感到自信并且精力旺盛。
So while ______ in the classroom and ______ papers, I felt confident and was full of energy.

10 . I do all the cooking for my family, but recently I ________ .(太忙而没有时间做). (根据汉语提示完成句子）