___we can’t understand is ____he didn’t join us in our discussion.
| A．That; why | B．Which; how | C．What; what | D．What; why |
—________ I take the book out?
—I'm afraid not.
| A．Will | B．May | C．Must | D．Need |
You ________ park here！It's an emergency exit.
| A．wouldn't | B．needn't | C．couldn't | D．mustn't |
—Will you read me a story，Mummy?
—OK.You ________ have one if you go to bed as soon as possible.(2011·陕西)
| A．might | B．must | C．could | D．shall |
One of our rules is that every student ________ wear school uniform while at school.(2012·辽宁)
| A．might | B．could | C．shall | D．will |
The new law states that people ________ drive after drinking alcohol.(2012·上海)
| A．wouldn't | B．needn't | C．won't | D．mustn't |