I saw him leave the office an hour ago . He ____ at this time .
| A．mustn''t be working | B．can''t be working |
| C．can''t work | D．may not being working |
----- Don’t look down upon Bob. He has his own advantages.
-----Oh, yes. __________ others are weak, he is strong.
| A．Where | B．Though | C．When | D．If |
Which record of his do they say _________best in their shop?
| A．sells | B．to sell | C．is sold | D．selling |
I’ll spend half of my holiday practicing English and ________ half learning
drawing.
| A．another | B．the other | C．other’s | D．other |
---Shall we go there by boat for a change?
---______.
| A．You say | B．It is up to you | C．It is hard to say | D．It is easy to tell |
Excuse me. I _____ I was blocking your way.
| A．didn’t realize | B．don’t realize | C．haven’t realized | D．won’t realize |