【正文】
19.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.A lot of online resources ________ be used either by teachers at school or parents at home.A.can B.should C.need D.must21.— 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.can22.—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’t23.—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A.shall B.need C.must D.could24.—Is that Mr Zhou?—It ________ be him. He has gone to Beijing.A.can B.may C.can’t D.shouldn’t25.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.— 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’t27.—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.must28.Cars ________ give way to walkers on some roads in Binhai, or the drivers will be fined.A.may B.will C.can D.must29.—How do you like my new dress? —Well, if I ________ say, it is not suitable for you.A.may B.must C.have to D.should30.—The article says that a person’s animal sign decides his personality.—You ________ read it for fun, but don’t believe in that.A.can B.must C.shouldn’t D.needn’t31.According to the rule, used batteries ________ be dropped in the red bin for harmful wastes.A.may B.would C.should D.might32.—In China, many students have to stay up late to do their homework.—No worries. The government has realized the problem. I’m sure there ________ be good news soon.A.can B.should C.must D.need33.—May I have some wine to drink?—No, you ________. You have to drive home later.A.mustn’t B.needn’t C.can’t D.may not34.—________ I see your ID card? We have to check your personal information. —Sure. Here you are.A.May B.Need C.Should D.Must35.You ________ be careful with the camera. It costs!A.can B.will C.should D.may36.It’s of great importance to protect the environment. Each of us ________ take an active part in it.A.can B.may C.would D.should37.—Do we have to finish this today?—Yes, you ________ .