Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.
| A．ability | B．competition | C．challenge | D．knowledge |
— May I remind you that a Mr. Smith is waiting outside, sir?
— Oh, that’s right. I ______ about it.
| A．forget | B．forgot | C．had forgotten | D．have forgotten |
They will fly to Washington, ______they plan to stay for two or three days.
| A．which | B．where | C．there | D．when |
—I’ve told Nancy many times about the meeting, but she still forget it!
—I understand. Actually, anyone ______ be very forgetful at times.
| A．must | B．should | C．ought to | D．can |
— David, keep ______ in mind that you have to be home by 10 o'clock.
— OK, Mom, I will.
| A．it | B．me | C．this | D．one |
______ all my homework unfinished, I am not allowed to go online to play games.
A. As B. For C. Without D. With
11. The lift ______ and we were trapped inside it.
A. broke down B. broke up C. broke out D. broke in