【正文】 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。 for D．No, we needn’t?，旣惤杞o了我們一些錢(qián)。故選B?？疾榍閼B(tài)動(dòng)詞辨析。may可能；must一定；can’t不可能；musn’t禁止。做情態(tài)動(dòng)詞時(shí)，無(wú)人稱與數(shù)的變化，且空后用動(dòng)詞原形；做實(shí)意動(dòng)詞時(shí)，有人稱和數(shù)的變化，用dare to do sth?！獙?duì)不起，我不會(huì)再那樣做了。20．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)。should應(yīng)該；could能夠，可表示委婉語(yǔ)氣或用于過(guò)去時(shí)中；would將會(huì)，將要；must必須，表示推測(cè)時(shí)，意為“一定”。can能，能夠；may可能；can’ t不可能，表示推測(cè)；shouldn’t不應(yīng)該；根據(jù)“He has gone to Beijing.”可知，那個(gè)人不可能是周先生，故選C。need doing=need to be done表被動(dòng)，故選A。再者對(duì)“May I ...?”的否定回答，一般用can’t或者mustn’t。考查情態(tài)動(dòng)詞詞義辨析。故選D。根據(jù)下文“otherwise he will be late for the meeting”，可知ABD三項(xiàng)不合語(yǔ)境，這里是說(shuō)必須告訴他時(shí)間改了，故選C。38．D解析：D【詳解】句意：——你覺(jué)得昨天的演出怎么樣？——有一些真的很好，但其他的可以更好。根據(jù)“You’ve got an A in the maths test again.”及結(jié)合語(yǔ)境可知，你肯定擅長(zhǎng)數(shù)學(xué)。你必須準(zhǔn)時(shí)歸還。——我不這么認(rèn)為。根據(jù)此處表示推測(cè)，應(yīng)該用may表示可能性，故選D。must必須；may可能；need需要；would將會(huì)；根據(jù)“I’m not sure.”可知，此處是不確定的推測(cè)，表示“可能”，應(yīng)用may，故選B?？疾榍閼B(tài)動(dòng)詞。must強(qiáng)調(diào)說(shuō)話者的主觀看法，have to強(qiáng)調(diào)客觀需要。must 必須，一定；should 應(yīng)該，shall的過(guò)去式；may 可能；shall 應(yīng)該。故選A。mustn’t禁止；shouldn’t不應(yīng)該；needn’t不必；can’t不能。你可以等好點(diǎn)再去。must必須；can能夠；may可以；could能夠。 dares climbD．dare to 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。根據(jù)“spelling mistakes are not allowed at all”可知，拼寫(xiě)錯(cuò)誤是不被允許的，所以報(bào)告必須重寫(xiě)?？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。11．C解析：C【詳解】句意：——那邊那個(gè)人是誰(shuí)？ 是布萊克先生嗎？ ——不可能是他。根據(jù)“But it depends.”可知，出國(guó)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。根據(jù) “My bike was broken y