—You know that you were driving at 100 kilometers per hour, don’t you?—No, officer, I _____ have been. This car can’t do more than 80.
| A．mustn’t | B．shouldn’t | C．may not | D．couldn’t |
John plays football _______, if not better than, David.
| A．as well | B．as well as | C．so well | D．so well as |
--- I hear Warren ______ in a middle school.
--- What? I can’t imagine him ______ as a teacher.
| A．teach; to work | B．teaches; working | C．teaches; to work | D．teach; working |
Failure is the mother of success. ______ your courage and you’ll succeed.
| A．Keep off | B．Keep out | C．Keep up | D．Keep on |
_______ some of this juice--- Perhaps you’ll like it.
| A．Trying | B．Try | C．To try | D．Have tried |
One of the sides of the board should be painted yellow, and _______.
| A．the other is white | B．another white | C．the other white | D．another is white |