【正文】
e exam.—Oh. You ________. He has known it already.A.to tell。 can39。 needn39。 mustn39。 shouldn39。d better __________ hard from now on, __________ you will fail the exam.A.work。 or C.working。 or11.—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。 againstC.be paid attention to。 be against13.I ________ hear you clearly. Would you please repeat it?A.mustn’t B.can’t C.needn’t D.shouldn’t14.If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day.A.can’t B.mustn’t C.needn’t D.shouldn’t15.— Zoe, what do you think is the greatest advantage of shopping online?— At least I ______ spend much time going from shop to shop.A.shouldn’t B.can’t C.needn’t D.mustn’t16.Please don39。t B.can39。t D.mustn39。ve got many foreign coins._______ I have a look?—Of course, I39。get used to it in winter.A.can’t B.needn’t C.mustn’t D.shouldn’t20.Our Chemistry teacher always tells us we ________ be too hardworking before the exams.A.mustn’t B.shouldn’t C.needn’t D.can’t21.Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.A.should B.would C.must D.can22.— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A.must B.may C.need D.would23.According to the rule, used batteries ________ be dropped in the red bin for harmful wastes.A.may B.would C.should D.might24.You _________ smoke here! Look at the sign. It says No smoking.A.needn39。t C.can D.may25.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.—Is it usually warm in Yancheng in May??—Yes. But it _______ be rather cold sometimes.A.must B.should C.would D.can28.You ________ pay too much attention to protecting yourself if you plan to go abroad.A.mustn’t B.can’t C.shouldn’t D.needn’t29.To avoid ________, we’d better ________ the parents’ meeting online.A.gather。 hold C.gather。 to hold30.—Must we stop the Japanese government discharging nuclear waste water (排放核污水) into the Pacific Ocean?—________. Because everyone should protect our earth and it is bad ________ us to eat the polluted seafood and drink the waste water.A.Yes, we can。 of C.Yes, we must。 for31.A hardworking man ________ bee a great scientist, but a great scientist __