【正文】
A.mustn’t B.should C.can D.needn’t5.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.need6.—Dad, must we wait until the light bees green? —Yes, I am afraid we ________. That’s the traffic rule.A.may B.can C.have to D.need7.You39。 or C.working。 againstC.be paid attention to。needn’tC.mustn’t I。 dare climbingC.dare saying。ll fetch them for you.A.May B.MustC.Should D.Need14.When I was young, my father ___________ take me to climb the hill which was not far from our house.A.may B.must C.would D.should15.—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.Dr. Zhong Nanshan once said, To prevent the spread of this disease, we________never be too careful.A.can B.may C.must D.should18.Think twice before making a decision, or you __________ get into trouble.A.may B.can39。ve discussed every detail of this plan and have got everything ready. But still something ________ go wrong. We still have to be very careful.A.must B.should C.would D.may24.—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.—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.need27.When people are waiting at the zebra crossing, cars and buses ________ wait and let them go first.A.must B.may C.can D.need28.—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。 for29.—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’t30.For the safety of the passengers, objects like guns ________ be carried on board.A.may not B.needn’t C.might not D.mustn’t31.— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A.must B.may C.need D.would32.—Mum, I bought some strawberries on my way home.—Oh, you’re so sweet. But the strawberries ________ be put into the fridge for freshness.A.must B.can C.may D.need