“Do you think he is lazy?” “I _________ so once, but I don’t now.”
| A．may have thought | B．can have thought | C．may think | D．might think |
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 |
Our teachers always tell us to believe in _____ we do and who we are if we want to succeed.
| A．why |
| B．how |
| C．what |
| D．which |