—Which of the two books will you take?
—I’ll take ______and I think______ of them is really helpful to me.
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The teacher demanded that the exam _____ before eleven.
| A．must finish | B．would be finished | C．be finished | D．must be finished |
You promised your friend a letter; you ought to ______ days ago.
| A．write | B．be writing | C．have written | D．be written |
Tell me how you work out the answer, _______ you?
| A．can | B．will | C．don’t | D．shan’t |
“ Need he go?” “ Yes, he ______.”
| A．need | B．can | C．may | D．must |
“ Isn’t that Tom playing basketball?” “ It ______ be; he fell off the ladder yesterday and got badly hurt.”
| A．mustn’t | B．would rather not | C．couldn’t | D．wouldn’t |