Either you or one of your students ______ to attend the meeting that is due tomorrow.
| A．are | B．is | C．have | D．be |
—I heard that they went skiing in the mountains last winter.
—It ________ true because there was little snow there.
| A．may not be |
| B．won’t be |
| C．couldn’t be |
| D．mustn’t be |
—Who is the girl standing over there?
—Well, if you ________ know, her name is Mabel.
| A．may |
| B．can |
| C．must |
| D．shall |
You and I could hardly work together,________?
| A．could you |
| B．couldn’t I |
| C．couldn’t we |
| D．could we |
—It’s the office! So you ________ know eating is not allowed here.
—Oh, sorry.
| A．must |
| B．will |
| C．may |
| D．need |
What do you mean, there are only ten tickets? There ________ be twelve.
| A．should |
| B．would |
| C．will |
| D．shall |