用所给动词的正确形式填空。

1. Lily _____________ (write) back to them as soon as she hears from her parents.

2. Tim_____________ (be) a computer fan, won’t he?

3. Everyone ____________ (not take) out the books until the teacher arrives at school.

4. Be careful, or you ____________ (fall) behind the other students.

5. If you ___________ (try) your best to do everything, everything is possible.

6. I___________ (stay) in Cangshan two days ago, now I_____________ (stay) in Beijing, I____________ (fly) to London in five days.

7. I’ll need_____________ (do) some______________ (wash) tomorrow.