—What has made John look like lacking sleep?
—________ he had to prepare for the coming exam and stayed up last night.
| A．For | B．Because |
| C．That | D．What |
In this experiment, they are wakened several times during the night, and asked to report what they _____.
| A．had just been dreaming | B．are just dreaming |
| C．just dreamt | D．have just been dreaming |
— I _ it as a must of a student that he should say hello to his teachers first whenever they meet.
— I can’t agree more.
| A．take | B．look | C．think | D．make |
It’s only when you lost something __how much you value it.
| A．you will realize | B．will you realize |
| C．then you will realize | D．that you will realize |
They boy is an excellent student, and not once in these years ___caught being late.
| A．has he got | B．does he get | C．did he get | D．will he get |
What have you said ____he should be angry with you?
| A．so | B．that | C．if | D．as |