1. Its ten years since I last (see) __________ her.
2. I think this institution (widen) __ twice since 1999.
3. You must wash vegetables carefully or the dirt from the farm on them (make) __________ you sick.
4. How long it (take) __________ you to walk to school when you were small?
5. Look! That plane is flying toward the airport. It (land) ____?
6. Its getting dark. The boys had better (not play) __________ football any longer.
7. He is busy at the moment. But he (come) __________ to give you a helping hand as soon as he finishes his work.
8. Eating fruit and vegetables everyday (be) _____very healthy.
9. He always (talk) __________ a lot when he is at home.
10. Daddy, could you tell me how (run) __________ this washing machine?
-> (?) Did + S + V-bare?