根据句子的语境，填写适当的连接词。

1. He said_________he had finished his homework in time.

2. I really don't know________she is.

3. I don't know________he didn't attend the meeting that day.

4. Tom asked me__________I had received his email.

5. He wondered_________he could get it or not.

6. She wants to know________many books he has sent to to you.

7. Do you remember_________I told you last time?

8. Do you know_________bag it is?

9. I wonder_________is your favorite in these books.

10. He asked me_________these fruits cost.