动词填空 用括号内所给动词的适当形式填空。(本大题共8分,每小题1分)
You can never imagine (想象) the great difficulty I had (get)her QQ number.
Why can’t you just understand? I _______________ (tell) you about it so many times!
—You may find the key to the maths problem on Page 8.
—Oh, it’s so easy. I wonder why I _______________ (not think) of that.
—Why didn’t you hear the doorbell?
—Because I ______________ (explain) a math problem to my daughter.
I am afraid the life we are used to _______________ (change) a lot in a few years’ time.
When I was chatting online, I heard someone ___________ (knock) at the windows.
The old man had to continue ________________ (work) to support his family after he retired (退休).
Please don’t play with your mobile phones while ________(have) such an important meeting, will you?