【正文】
A.can B.may C.must D.should20.We shouldn’t throw any 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.need21.For the safety of the passengers, objects like guns ________ be carried on board.A.may not B.needn’t C.might not D.mustn’t22.— 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.must23.—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’t24.—Is that Mr Zhou?—It ________ be him. He has gone to Beijing.A.can B.may C.can’t D.shouldn’t25.—Will Jim e to Yangzhou for a holiday?—He ________e and it depends on how much homework he will have.A.may B.should C.must D.need26.—Is it usually warm in Yancheng in May??—Yes. But it _______ be rather cold sometimes.A.must B.should C.would D.can27.— Is the boy over there Tom? He often wears a jacket like that.— It _______ be him. He is absent from school today.A.needn’t B.shouldn’t C.mustn’t D.can’t28.—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.need29.—I must go to school today, ________?—No, you can go as soon as you get well.A.mustn’t I。t make so much noise. I ________ hear the speaker very well.A.needn39。 and B.working。d better __________ hard from now on, __________ you will fail the exam.A.work。 or2.To my joy, we_________ go to the bank. Mary has lent us some money.A.shouldn’t B.needn’t C.couldn’t D.wouldn’t3.— Excuse me, could you tell me where the Nanjing Brocade Museum is?— Go along this road for five minutes. You ________ miss it. It’s a huge building.A.mustn’t B.can’t C.needn’t D.shouldn’t4.— Why didn’t you tell it to me earlier?— Why ________ I? I want to have my own secret.A.can B.may C.should D.shall5.—Mum, why do I have to wear a mask before entering the supermarket?—For your health and safety, you ________ be too careful.A.shouldn’t B.can’t C.mustn’t D.needn’t6.—Hurry up, Jack! Let’s cross the road as fast as possible.—No, you ________. Don’t you see the light is still red?A.couldn’t B.wouldn’t C.mustn’t D.needn’t7.—The high school entrance examination is ing!— Yes, our teacher tells us we ________ be too careful while taking exams.A.mustn’t B.shouldn’t C.needn’t D.can’t8.—Be careful! Fire ________ be dangerous sometimes. —OK. I will put it out right away.A.mustn’t B.should C.can D.needn’t9.Hurry up, or we