【正文】 riving B．not to drive C．no driving D．not drive20．Exercise is helpful but it ________ be regular (規(guī)律的) exercise.A．must B．may C．can D．need21．Mr. Black ________ be at home now. He went abroad on vacation last Friday.A．can’t B．mustn’t C．needn’t D．shouldn’t22．— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A．must B．may C．need D．would23．—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A．shall B．need C．must D．could24．Never throw objects from the building. Even a small object ________ cause serious injuries, or death, when dropped from a great height.A．must B．should C．may D．need25．I think all the students love the weekends because, to them, they ________ get up early on Saturdays or Sundays.A．mustn’t B．don’t need C．needn’t D．can’t26．When people are waiting at the zebra crossing, cars and buses ________ wait and let them go first.A．must B．may C．can D．need27．—Shall I tell him the change of the time right now?—I’m afraid you ________, otherwise he will be late for the meeting.A．can B．may C．must D．need28．Look at the floor, Tom! ________ you watch TV while having a meal?A．Should B．Could C．Must D．May29．You ________ require others to do with the problem like you. Everyone has his own way.A．mustn’t B．needn’t C．may not D．shouldn’t30．Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.A．should B．would C．must D．can31．A hardworking man ________ bee a great scientist, but a great scientist ________ be a hardworking man.A．can’t。 can B．may not。 must C．can’t。 must D．may not。 can32．—How beautiful the winter jasmines (迎春花) are!—Yes. These goldenyellow flowers ________ be widely seen in my city in March.A．must B．can C．would D．should33．— What do you think of the show yesterday?— Some of them were really good but others ________ be better.A．will B．must C．need D．can34．—I don’t care what people think.—Well, you _______ . Some opinions are worth weighing.A．should B．might C．could D．would35．You ________ drive after drinking alcohol(酒). It’s against the law.A．mustn’t B．needn’t C．couldn’t D．wouldn’t36．—I think they are enough. We ________ make so many chairs.—I don’t think so. Because nearly a quarter of them need ________.A．don’t need to。 mending B．needed。 to be mendedC．don’t need。 mend D．need。 to mend37．You ________ be careful with the camera. It costs!A．can B．will C．should D．may38．—Do we have to finish this today?—Yes, you ________ . Today is the last day.A．would B．may C．can D．must39．—Is it really n