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C.needn’t D.can’t30.— The sandstorm in Beijing is so serious this year.— Yes, I wonder when we ________ worry about the air we breathe.A.can’t B.mustn’t C.needn’t D.shouldn’t31.A hardworking man ________ bee a great scientist, but a great scientist ________ be a hardworking man.A.can’t。 must C.can’t。 can32.—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.need33.— 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.can34.—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.need35.—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 not36.We teenagers ________ have dreams. With dreams and hard work, anything amazing ________ be created.A.may。 should C.should。 has to37.You ________ be careful with the camera. It costs!A.can B.will C.should D.may38.—Do we have to finish this today?—Yes, you ________ . Today is the last day.A.would B.may C.can D.must39.Sorry, smoking is not allowed here. If you ________ , you will be fined according to the rules.A.can B.will C.may D.must40.— Excuse me. I haven’t finished reading the book yet. May I keep it a bit longer?— Sorry, you ________. You must return it on time.A.needn’t B.can’t C.won’t D.shouldn’t【參考答案】一、選擇題1.C解析:C【詳解】句意:如果你給你媽媽買(mǎi)一臺(tái)掃地機(jī)器人,她就不必每天掃地了。can’t不能;mustn’t禁止;needn’t不需要;shouldn’t不應(yīng)該。2.B解析:B【詳解】句意:使我高興的是,我們不必去銀行了??疾榍閼B(tài)動(dòng)詞辨析。由“Mary has lent us some money”可知,瑪麗已經(jīng)借給我們錢(qián)了,所以我們不必再去銀行了。3.C解析:C【詳解】句意:——有人敲門(mén)。她總是這個(gè)時(shí)候回家。may也許;may not也許不;must一定;can’t不能。4.D解析:D【詳解】句意:——我的車(chē)今天能修好嗎?——應(yīng)該能,先生,如果有什么問(wèn)題我會(huì)打電話(huà)給你。must必須,一定,表推測(cè)時(shí),語(yǔ)氣最肯定;could可能,表推測(cè)時(shí),其意很不肯定;shall將,會(huì);should應(yīng)當(dāng),應(yīng)該,表示推測(cè)時(shí),其語(yǔ)氣比較肯定,它通常指非??赡艿氖拢凳酒渫茰y(cè)有一定的事實(shí)依據(jù)或者合乎常理。故選D。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。6.D解析:D【詳解】句意:我們的化學(xué)老師總是告訴我們考試前怎樣用功都不為過(guò)。mustn’t不能,表禁止;shouldn’t不應(yīng)該,表建議;needn’t不必,指沒(méi)有必要;can’t不能,表沒(méi)有能力或不許可。故選D。這是交通規(guī)則。may可能;can可以;have to必須;need需要;根據(jù)“must we wait until the light bees green”及“That’s the traffic rule”可知,每個(gè)人都必須要遵守交通規(guī)則,應(yīng)用have to,故選C?!獩](méi)問(wèn)題。Could能、會(huì)(用在問(wèn)句中表示委婉語(yǔ)氣);Should應(yīng)該;Need需要;Must必須。故選A?!唬悴荒苓@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。你能重復(fù)一下嗎?考查情態(tài)動(dòng)詞。根據(jù)“Would you please repeat it?”可知,我不能聽(tīng)清,所以需要對(duì)方重復(fù),故選B。你太年輕了。shouldn’t不應(yīng)該;mustn’t禁止;can’t不能;needn’