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er.A.can’t B.needn’t C.mustn’t D.shouldn’t19.Dr. Zhong Nanshan once said, To prevent the spread of this disease, we________never be too careful.A.can B.may C.must D.should20.It’s amazing that the pen ________turn voice into text with few mistakes.A.can B.must C.may D.need21.Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.A.should B.would C.must D.can22.You _________ smoke here! Look at the sign. It says No smoking.A.needn39。t B.mustn39。t C.can D.may23.— Listen! Tom ________ be listening to the music while doing his homework.— Let’s go upstairs to remind him to turn it off.A.should B.could C.would D.must24.—Must I finish all my homework today, Mum?—No, you ________, my dear. You can finish some tomorrow if you like.A.needn’t B.shouldn’t C.can’t D.mustn’t25.We39。ve discussed every detail of this plan and have got everything ready. But still something ________ go wrong. We still have to be very careful.A.must B.should C.would D.may26.—In China, many parents plain that their children have to stay up late to do the homework. —Don’t worry. The government has realized the problem. I’m sure there ________ be good news soon.A.can B.should C.need D.must27.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’t28.—Is it usually warm in Yancheng in May??—Yes. But it _______ be rather cold sometimes.A.must B.should C.would D.can29.—I must go to school today, ________?—No, you can go as soon as you get well.A.mustn’t I。needn’t B.needn’t I。needn’tC.mustn’t I。mustn’t D.needn’t I。mustn’t30.— Excuse me. I haven’t finished reading the book yet. May I keep it a bit longer?— Sorry, you ________. You must return it on time.A.needn’t B.can’t C.won’t D.shouldn’t31.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.You’ve got an A in the maths test again. You ________ be good at it.A.can B.may C.must D.should33.—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.should34.— 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.can35.—In China, many students have to stay up late to do their homework.—No worries. The government has realized the