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40.A解析:A【詳解】句意:——媽媽,為什么我必須一天洗那么多次手?——為了你的健康,你越小心越好。may not也許不;needn’t不需要;might not也許不;mustn’t禁止。37.C解析:C【詳解】句意:——你能告訴我怎樣續(xù)借圖書館的書嗎?——非常樂意。根據(jù)“hiding other feelings like anger, fear or worry.”可知微笑可能是假的。考查情態(tài)動詞。根據(jù)“He is absent from school today”可知,推測那個男孩一定不是湯姆,否定推測用can’t,故選D。考查情態(tài)動詞表推測。30.D解析:D【詳解】句意:——在中國,許多家長抱怨他們的孩子不得不熬夜做家庭作業(yè)。根據(jù)句意可知,年輕人喜歡網(wǎng)上購物,是因為他們不必把時間花在來回逛商店上。27.C解析:C【詳解】句意:切勿將物體從建筑物中扔出去。我們?nèi)匀灰浅<?xì)心。根據(jù)“used batteries…be dropped in the red bin for harmful wastes”可知,使用過的電池應(yīng)丟棄在紅色的有害廢物箱中,故選C。根據(jù)“to them, they ... get up early on Saturdays or Sundays”結(jié)合常識可知周六或周日學(xué)生么不必早起。一定是他。根據(jù) “My bike was broken yesterday我的自行車昨天壞了”可知,此處表達(dá)“所以我不得不步行回家”,用情態(tài)動詞的過去式had to表示“不得不”。17.C解析:C【詳解】句意:在我小的時候,我的父親會帶我去爬山,那離我們家不遠(yuǎn)。But still something may go 。第一空排除C??疾榍閼B(tài)動詞辨析。根據(jù)“If you buy your mum an iRobot floor cleaner”可知,買了掃地機(jī)器人,就不需要人工每天掃地了,故選C。11.A解析:A【詳解】句意:——我不在乎別人怎么想。t禁止;needn39。考查情態(tài)動詞。根據(jù)下文“Don’t you see the light is still red”可知,現(xiàn)在是紅燈,禁止過馬路,故選C。5.B解析:B【詳解】句意:——媽媽,為什么我進(jìn)超市前要戴口罩? ——為了你的健康和安全,你再小心也不為過。shouldn’t不應(yīng)該;mustn’t禁止;can’t不能;needn’t沒必要;根據(jù)“You are too young.”可知,你太年輕了,由此說明你不能參加對方的計劃。瑪麗借給了我們一些錢。 must D.may not。t15.The boy is very brave.I ________ he ________ the tall tree.A.dare say。t 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.may26.—Is that Mr Zhou?—It ________ be him. He has gone to Beijing.A.can B.may C.can’t D.shouldn’t27.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.need28.Most young people like shopping online because they ________ spend much time going from shop to shop.A.needn’t B.can’t C.mustn’t D.shouldn’t29.—Is it really necessary for me to go shopping with a mask on?—I’m afraid you ________ in public. It is not only to protect yourself but also to protect others.A.must B.should C.can D.need30.—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.must31.A hardworking man ________ bee a great scientist, but a great scientist ________ be a hardworking man.A.can’t。故空格處的意思是可以,能夠。3.C解析:C【詳解】句意:——我可以加入你的計劃嗎?——對不起,你不能??疾榍閼B(tài)動詞。6.C解析:C【詳解】句意:——快點,杰克!讓那個我們盡快地過馬路。故選D。can39。must一定,必須;may也許;can能夠;need需要。12.C解析:C【詳解】句意:如果你給你媽媽買一臺掃地機(jī)器人,她就不必每天掃地了。根據(jù)“But it depends.”可知,出國深造的可能性不是很大,大概是50%左右,表示50%左右的可能性,“may”符合句意,故選C。15.A解析:A【解析】句意“這個小男孩非常的勇敢,我敢說,他敢爬上那棵高的樹”。C. would 將,將會(will 的過去式)。He may be at home. 他或許在家