________ walk is expected to last all day，so bring ________ packed lunch.
| A．A；a | B．The；/ | C．The；a | D．A；/ |
– Why you didn’t handed in your exercise paper?
–Sorry, but I ____ that it should be turned in today.
| A．didn’t know | B．hadn’t known |
| C．haven’t known | D．don’t know |
—How is the debate of your essay?
—It ____ well, but I ____one of the key points.
| A．might work; hadn’t forgot | B．needn’t have worked; forgot |
| C．could have worked; forgot | D．would work; hadn’t forgot |
–When can I get the result of the test, sir?
–You ____ have it next Friday.
| A．could | B．shall | C．must | D．may |
No words can ____ his feelings when the money dropping on the street was sent back to him.
| A．control | B．convey | C．exchange | D．affect |
The problem may not____, but there's no harm to be careful.
| A．arise | B．reduce | C．increase | D．rise |