30. He was told that it would be at least three more months ______ he could recover and return to work.
| A．when | B．before | C．since | D．that |
I ______ have been more than six years old when the accident happened.
| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
-Is there any flight to New York today?--I think there ____ be, for the weather is too bad.A mustn’t B may not C shouldn’t D can’t
Naturally, after I told her what to do, my daughter _____ go and do the opposite!
| A．may | B．can | C．must | D．should |
—I hear you have written a novel.—Yes, the book ________ be out in a month or so.
| A．can | B．dare | C．should | D．need |
—Is there a fog in the evening?—There _______ be. I’ll make a phone call to find it out.
| A．must | B．would | C．will | D．might |