If _______ in class, you will have to clean the classroom for a week as a punishment.
| A．caught sleeping | B．caught to be sleeping |
| C．catching sleeping | D．to catch to sleep |
— Kingston was late for class this morning again.
— You know, _________.
| A．all good things come to an end |
| B．a leopard(豹)cannot change its spots |
| C．never judge a person by the clothes he wears |
| D．a work ill done must be twice done |
You didn’t take his advice. ________ his advice, you ________such a stupid mistake.
| A．Had you taken; wouldn’t have made |
| B．If you had taken; would make |
| C．Were you to take; shouldn’t have made |
| D．Have you taken; won’t have made |
The radiation amount of a mobile phone for two half-hour periods per day is equal to ________ to an X-ray for ten seconds.
| A．expose | B．exposing | C．exposed | D．being exposed |
. ________ he realized it was too late to return home.
| A．Not until dark | B．It was until dark |
| C．It was not until dark that | D．It was dark that |
It’s already 10:00, I wonder how it _______ that she was two hours late on such a short trip.
| A．came over | B．came out | C．came about | D．came up |