The head teacher comes to the classroom ______ to see if the students are quiet.
| A．here and there | B．now and then |
| C．sooner or later | D．here and now |
—Sorry, I’m late.
—That’s OK. You’re here and that’s what_________.
| A．counting | B．to count | C．be counted | D．counts |
My mind wasn’t on what he was saying so I’m afraid I ______ half of it.
| A．was missing | B．missed | C．had missed | D．will miss |
It was not ______ he took off his dark glasses ______ I realized he was Liu Xiang.
| A．when; that | B．until; when | C．when; then | D．until; that |
Locked in his own study, Tony was annoyed for _____ the change earlier.
| A．having not informed | B．not having informed of |
| C．not being informed | D．not having been informed of |
Hi, Susan, are you interested in buying some used books for school? You _____ really save some money that way.
| A．need | B．can | C．must | D．should |