Tom couldn’t ___ those forms until I had explained how to do it twice.
We ____ last night, but we went to the concert instead. A must have studied B might study C should have studied D would study
I ______ have been more than six years old when the accident happened.
-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!
—I hear you have written a novel.—Yes, the book ________ be out in a month or so.