1 . Nobody knew where Tom was. He might________ (go) abroad. (所给词的适当形式填空)

2 . I haven’t received the letter yet. It might ________ (send) to the wrong address. (所给词的适当形式填空)

3 . Only when the results came out did he realize that he should ________ (devote) himself to his studies, but it was too late. (所给词的适当形式填空)

4 . He was very busy yesterday, otherwise he ______ (come) to the meeting. （所给单词适当形式填空）

5 . 请根据情态动词、虚拟语气、状语从句及名词性从句的基本用法进行填空。
1. We ______(face) the difficulty together, but why didn't you tell me?
2. But for the rain, we ______(have) a pleasant journey yesterday.
3. I strongly recommend that he ______(get) professional help.
4. I promise you ______ see her again before long.
5. ______ you worry her with questions, just when she is busy cooking dinner?
6. He is quite strange; for everything he does is opposite to ______ is considered normal behavior.
7. ______ Shelley became a poet may have been due to his mother's influence.
8. Keep him ______ you can see him.
9. He didn't know ______ he had answered the question in that way.
10. The question is ______ it's worth doing it.