【正文】
ack! 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.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.need9.—I don’t care what people think.—Well, you _______ . Some opinions are worth weighing.A.should B.might C.could D.would10.Exercise is helpful but it ________ be regular (規(guī)律的) exercise.A.must B.may C.can D.need11.—Who’s the man over there? Is that Mr. Black? —It ________ be him. Mr. Black is much taller than that man.A.may B.must C.can’t D.mustn’t12.— Mom, must I clean my room now?— No, you ________. You can do it after dinner.A.needn’t B.mustn’t C.shouldn’t D.can’t13.—Have you decided to take up teaching as career after graduation? —I ________ go abroad for further education instead. But it depends.A.must B.should C.may D.shall14.The boy is very brave.I ________ he ________ the tall tree.A.dare say。 dares climbed15.—Shall we go camping this summer holiday?—Nothing________be better.A.should B.could C.must D.may16.My bike was broken yesterday,so I____walk home. A.might B.had to C.must D.could17.—Would you please________in that way? That’s not safe!—Sorry. I won’t do it any more.A.not driving B.not to drive C.no driving D.not drive18.—Will your mother be at home this Saturday?—Hard to say. She _______go to the countryside to see my grandparents.A.must B.may C.can D.would19.Don’t cross the road until the traffic lights turn green. A car_______hit you.A.need B.may C.should D.must20.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.—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。 for22.— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A.must B.may C.need D.would23.— 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