—Look! The lights in the teachers’ office are still on. Is Mr. Li working?
—No. It _______ be Mr. Li. I saw him leave just now.
| A．may not | B．mustn’t | C．can’t | D．needn’t |
I like English very much. I think it’s a little ____than math.
| A．easy | B．easier |
| C．easiest | D．the easiest |
We __________ in the same school since three years ago.
| A．study | B．were studying |
| C．will study | D．have studied |
We were in Qingdao last week and ____ great fun there.
| A．will have | B．have had | C．had | D．have |
—_____ did Mr Li finish the work last night? —At about eleven, I think.
| A．What | B．Where | C．Who | D．When |
--_____ you call back tomorrow? --Of course I can.
| A．Can | B．Must | C．May | D．Need. |