1. He didn't attend her birthday party, because he must return to school before dark.
2. Because of the class were absent, he did not learn how to solve these problems (with the predicate verb)
3. He to the result of the experiment was very disappointed, he had to do it again from the beginning. (as above)
4. After reading these novels, he immediately will they returned to the library. (as above)
5. The girl was too weak and cannot walk under the bed. According to the doctor's statement, he at least will stay in bed for a week.
6. No his address, how do you write to him? I remember giving you his phone number.
7. Whenever you have difficulties you can ask me for help.
8. Teacher wang looks than his real age small, but his age is my 3 times.
9. Because he didn't have enough experience, he is unlikely to succeed. At present he should do is to experienced comrade learning.
10. You don't have to pretend to know all things, there is no one will be your stupid fool.