---Could you tell me _______?
---Sorry，I have no idea. .
| A．when does the History Museum open | B．when the History Museum opens |
| C．when did the History Museum open | D．when is the History Museum open |
There are ______ students in our school.
A. three thousands of B. three thousand C. three thousands
If he _____ his homework, he’ll go to the movies tonight.
A. will finish B. finish C. finishes
Would you mind ______ the DVD?
A. turning down B. turn down C. to turn down
It’s too cold . Please keep the door ______.
A. close B. closed C. closing
— _____ have you been studying English?
— For two years.
A. How many B. How soon C. How long