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height.A.must B.should C.may D.need5.Exercise is helpful but it ________ be regular (規(guī)律的) exercise.A.must B.may C.can D.need6.You39。d better __________ hard from now on, __________ you will fail the exam.A.work。 or C.working。 or7.—Where is Tom? I am considering ________ him about the result of the exam.—Oh. You ________. He has known it already.A.to tell。t B.telling。t C.tell。t D.told。t8.When you visit a museum, some instructions should ________ and we’d better not ________ them.A.pay attention to。 againstC.be paid attention to。 be against9.—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’t10.— 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’t11.—Hurry up, Jack! 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’t12.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’t17.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.—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.Think twice before making a decision, or you __________ get into trouble.A.may B.can39。t D.mustn39。t B.mustn39。 of B.No, we mustn’t。 for D.No, we needn’t。 can B.may not。 must D.may not。 can B.might。 can D.must。但要看情況。must 必須,一定;should 應(yīng)該,shall的過(guò)去式;may 可能;shall 應(yīng)該。2.B解析:B【詳解】句意:在交通燈變綠之前不要橫穿馬路??疾榍閼B(tài)動(dòng)詞。分析句意可知,交通燈變綠之前橫穿馬路,汽車有可能會(huì)撞到你,故此處應(yīng)用may表推測(cè)。3.C解析:C【詳解】句意:——小心!火有時(shí)候會(huì)很危險(xiǎn)。我馬上把火撲滅。mustn’t禁止;should應(yīng)當(dāng);can會(huì)、能;needn’t不需要。故選C。當(dāng)從很高的高度掉落時(shí),即使一個(gè)小的物體可能導(dǎo)致嚴(yán)重的傷害或死亡。must必須;should應(yīng)該;may可能;need需要。5.A解析:A【詳解】句意:鍛煉是有幫助的但是它必須是有規(guī)律的鍛煉。must一定,必須;may也許;can能夠;need需要。故選A??疾榍閼B(tài)動(dòng)詞和連詞辨析。and和;or否則。7.B解析:B【詳解】句意:——湯姆在哪里?我正在考慮告訴他考試的結(jié)果。你不必??疾榉侵^語(yǔ)動(dòng)詞和情態(tài)動(dòng)詞。t不可能;needn39。t禁止;shouldn39。consider doing ,第一空用telling;再由“He has known it already.”可知他已經(jīng)知道考試結(jié)果,不必再告訴他,第二空用needn39。故選B。考查含情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)和情態(tài)動(dòng)詞跟動(dòng)詞原形。故選D??疾榍閼B(tài)動(dòng)詞?!癱an’t be too +adj.”意為“再怎么樣也不為過(guò)”,結(jié)合語(yǔ)境,故選D??疾榍閼B(tài)動(dòng)詞。t不應(yīng)該;can39。t不需要;mustn39。根據(jù)句意可知,網(wǎng)上購(gòu)物的最大優(yōu)點(diǎn)是不需要花很多時(shí)間逛店。t”表示“不需要”,故選C。——不,你不能這樣,你沒(méi)有看到是紅燈嗎?考查情態(tài)動(dòng)詞。根據(jù)下文“Don’t you see the light is still red”可知,現(xiàn)在是紅燈,禁止過(guò)馬路,故選C。我不能很好地聽清楚發(fā)言者的話。needn’t不必,指沒(méi)必要;can’t不能,指不能夠;shouldn’t不應(yīng)該,表建議;mustn’t不能,表禁止。t make so much noise”可知,別人發(fā)出了太多噪音,所以他“不能夠”聽見(jiàn)演講者的話,需用情態(tài)動(dòng)詞can’t。13.D解析:D【詳解】本題考查:情態(tài)動(dòng)詞辨析。B. should應(yīng)該;就;可能;將要。D. may可以,能夠。But still something may