–Why, Jack! Someone seems to have called you over there. – Yes? I __________ that.
| A．am not realizing | B．haven’t realized |
| C．didn’t realize | D．don’t realize |
He _______ speak to his mother like that.
A ought not to B. doesn’t ought to C not ought to D ought to not
--- Isn’t that Jessica’s brother over there?
--- No, it _______ be him. I’m sure he doesn’t wear glasses.
A. can’t B. must not C won’t D may not
She was fired by the boss because she failed to ___________ for work on Monday.
A. turn up B. turn down C. turn on D turn out
Great changes _________ in China in the last two decades.
| A．have taken place | B．took place |
| C．have been taken place | D．are taking place |
We must set a limit __________ the expense of the trip.
| A．to | B．on | C．for | D．with |