It be the vocabulary that caused you the problem in the exercise because you know a lot of words.
| A．may |
| B．couldn’t |
| C．should |
| D．needn’t |
Could you please _____ so much noise here?
| A．not to make |
| B．not make |
| C．don’t make |
| D．won’t make |
The air force of that country is _____ the command of General Hall.
| A．at |
| B．with |
| C．under |
| D．for |
My English teacher advised I _____ keep my mouth shut to improve my spoken English.
| A．to |
| B．not to |
| C．not |
| D．mustn’t |
The manager told her _____ to post the letters by 3:00 in the afternoon.
| A．do remember |
| B．be sure to remember |
| C．to remember |
| D．remembering |
Bring the flowers into a warm room _____ they’ll soon open.
| A．or |
| B．and |
| C．but |
| D．for |