—Must we finish the project in a month? —No, you _______. A. mustn’t B. needn’t C. can’t
My father ___________________________ when he was in his twenties.
It is dangerous ____ you ______ a close look at the tiger in the zoo.
Take the paper with you. The details we ought to pay attention to ________ on it already.
This problem worried her so much that she didn’t know ___________ with it..
It _______ ten years since my sister ______ an English teacher.