【正文】 “I’m sure”可推知，應(yīng)是“there must be，一定有”，表示肯定的推測。39．A解析：A【詳解】句意：——我想足夠了?？疾榍閼B(tài)動詞辨析。need doing=need to be done表被動，故選A。may可以，表請求或許可；need需要，指有必要；should應(yīng)該，表建議；must必須，強調(diào)主觀意愿?？疾榍閼B(tài)動詞辨析。但草莓必須放進冰箱保鮮。can’t不可能；mustn’t禁止；needn’t不必；shouldn’t不應(yīng)該。——是的，我想知道什么時候我們不需要擔(dān)心我們呼吸的空氣。我可以再借一段時間嗎？—— 抱歉，你不可以。有時他加班。can’t不可能；mustn’t禁止；may not可能不；needn’t不必。根據(jù)“Suzy described every detail of the accident just now.”可知，此處表示非常肯定的推測，故選C。我們?nèi)匀灰浅＜毿?。由答語中的“turn it off”可知，此句是推測湯姆一定是在邊聽音樂邊做作業(yè)，故選D。上面寫著“禁止吸煙”。can’t不能；mustn’t禁止；needn’t不需要；shouldn’t不應(yīng)該。it故選D。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。本題考查情態(tài)動詞的用法，由When I was young 可知，when引導(dǎo)的從句為一般過去時，因此主句應(yīng)為過去的某種時態(tài)；再結(jié)合句意及選項，可知C選項符合題意，would+動詞原形是過去將來時；故答案選C。故選A。考查情態(tài)動詞。avoid doing sth.“避免做某事”；We’d better+動詞原形，我們最好做某事；gather是動詞，聚集；hold是動詞，舉行，第一空用動名詞，第二空用動詞原形，故選B。t。他已經(jīng)知道這件事了。一定是他。may也許；may not也許不；must一定；can’t不能?？疾榍閼B(tài)動詞辨析。t be too+“再……也不為過”，故選D?？疾榍閼B(tài)動詞。 for22．You _________ smoke here! Look at the sign. It says No smoking.A．needn39。ll fetch them for you．A．May B．MustC．Should D．Need14．When I was young, my father ___________ take me to climb the hill which was not far from our house.A．may B．must C．would D．should15．You ______ pay too much attention to your pronunciation, as it is so important in the oral（口頭的） test.A．shouldn’t B．mustn’t C．can’t D．needn’t16．—Shall we go camping this summer holiday?—Nothing________be better.A．should B．could C．must D．may17．—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．— Ready? Let’s get started, Martin.— Swimming? I just ________ againstC．be paid attention to。t B．telling。t B．shouldn39。 mustn39。 hold B．gathering。t D．mustn39。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．—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A．shall B．need C．must D．could27．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’t28．— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A．can’t B．mustn’t C．may not D．needn’t29．Hurry up, or we ________ miss the beginning of the film.A．should B．must C．may D．have to30．— Will dad arrive home at 6 o’clock to have dinner with us this evening?— I think he will, but he ________ not. Sometimes he works extra hours.A．can B．must C．need D．may31．According to the rule, used batteries ________ be dropped in the red bin for