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be dropped in the red bin for harmful wastes.A.may B.would C.should D.might23.— 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.—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A.shall B.need C.must D.could25.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.need26.Most young people like shopping online because they ________ spend much time going from shop to shop.A.needn’t B.can’t C.mustn’t D.shouldn’t27.— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A.can’t B.mustn’t C.may not D.needn’t28.When people are waiting at the zebra crossing, cars and buses ________ wait and let them go first.A.must B.may C.can D.need29.To avoid ________, we’d better ________ the parents’ meeting online.A.gather。t3.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’t4.— 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’t5.—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.—There is a knock at the door.—It ________ be my mom. She always es back home at this time.A.may B.may not C.must D.can’t7.—Will my car be ready by the end of the day?—It ________ be, sir. I’ll call if there’s any problem.A.must B.could C.shall D.should8.— ________ you give me a hand? I can’t put up the poster by myself.—No problem.A.Could B.Should C.Need D.Must9.—Who is singing next door? It sounds like a young girl’s voice.—It _________ be Jane. But she seldom sings English songs.A.need B.must C.may D.can10.You ________ write the report again because spelling mistakes are not allowed at all.A.must B.can C.may D.could11.—Could I join you in the programme?—Sorry, you ________. You are too young.A.shouldn’t B.mustn’t C.can’t D.needn’t12.When you visit a museum, some instructions should ________ and we’d better not ________ them.A.pay attention to。 needn39。t C.tell。 be against B.be paid attention。 hold B.gathering。 mending B.needed?!丁不應(yīng)該。每個(gè)人都有自己的方法。mustn’t不能,表禁止;can’t不可能,表否定推測;needn’t無需,指沒有必要;shouldn’t不應(yīng)該,表建議?!欢ㄊ俏覌寢尅8鶕?jù)“I’ll call if there’s any problem”可知,是說話人按照事實(shí)有一定依據(jù)的推測,用should符合語境。9.C解析:C【詳解】