【正文】 C．may D．must12．— 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．If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day.A．can’t B．mustn’t C．needn’t D．shouldn’t14．—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．shall15．We’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．may16．—Amy, I hear you39。 for D．No, we needn’t。故選B。根據(jù)“Must the children leave at six tomorrow morning?”可知，此處為Must引導(dǎo)的一般疑問句，否定答語要用need’t或don’t have to，故選B。根據(jù)“It is not only to protect yourself but also to protect others.”可知在公共場合必須戴口罩。根據(jù)英語語法，對于must開頭一般疑問句，若要作否定回答，可用needn’t，不用mustn’t。綜合分析前后句， 可知此處填may最合適，完整句意為：We’ve discussed every detail of this plan and have got everything ，一切都準備好了。根據(jù)Shall we go camping this summer holiday，可知，此空要對上文的建議表達自己的看法。it但仍然有可能出錯?？疾榍閼B(tài)動詞的用法?？疾榍閼B(tài)動詞表推測，can能，會；must必須；need需要；may可能。must引導(dǎo)的一般疑問句否定回答為needn’t或don’t have to，故選A。布萊克先生比那個人高得多。38．D解析：D【詳解】句意：保護環(huán)境是非常重要的。根據(jù)“Must we stop the Japanese government discharging nuclear waste water into the Pacific Ocean”可知，對于日本政府向太平洋排放核廢料這個行為，我們是必須要阻止的，用must表示“必須”?！牛銘?yīng)該在乎。考查情態(tài)動詞。31．A解析：A【詳解】句意：——媽媽，我必須今天完成所有作業(yè)嗎？——不，你不必，親愛的。needn’t不必；shouldn’t不應(yīng)該；mustn’t禁止；can’t不可能?？疾榍閼B(tài)動詞辨析。should表示推測，應(yīng)該。can’t不能；needn’t不必；mustn’t禁止；shouldn’t不應(yīng)該。本題表示“請求”看看硬幣，用may，故選A。選項分析：A. must必須，一定。12．A解析：A【詳解】句意：——媽媽，我現(xiàn)在必須打掃房間嗎？ ——不，不需要。9．A解析：A【詳解】句意：——我真的有必要帶著口罩去購物嗎？——恐怕在公共場合你必須如此。6．B解析：B【詳解】句意：——孩子們明天早上六點必須離開嗎？ ——不，他們不必。你可以等好點再去。get used to it in winter.A．can’t B．needn’t C．mustn’t D．shouldn’t20．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．need21．You’ve got an A in the maths test again. You ________ be good at it.A．can B．may C．must D．should22．We39。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．may23．—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A．shall B．need C．must D．could24．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．need25．Most young people like shopping online because they ________ spend much time going from shop to shop.A．needn’t B．can’t