【正文】 致。在本句中，to do動(dòng)詞不定式作目的狀語(yǔ)。不定式做狀語(yǔ)，表示目的；故選D20．A解析：A【解析】句意：我們?cè)O(shè)立世界讀書(shū)日，鼓勵(lì)青少年養(yǎng)成良好的閱讀習(xí)慣。這類(lèi)動(dòng)詞主要有：make / see /hear /feel /watch等。點(diǎn)睛：主動(dòng)語(yǔ)態(tài)中省略to 的不定式作賓語(yǔ)補(bǔ)足語(yǔ)，變被動(dòng)語(yǔ)態(tài)時(shí)要加上to。18．D解析：D【解析】句意：海倫被迫在兩天內(nèi)完成這項(xiàng)任務(wù)。allow用于被動(dòng)語(yǔ)態(tài)時(shí)，必須接不定式作賓語(yǔ)補(bǔ)足語(yǔ)，不能接動(dòng)名詞形式。對(duì)不起，我沒(méi)看見(jiàn)。be busy后面接動(dòng)名詞作賓語(yǔ)，故選B。16．B解析：B【詳解】句意：——為什么這名醫(yī)生不停下來(lái)吃午飯呢？ ——因?yàn)樗谑中g(shù)室忙于挽救一位危重病人。此處表示目的狀語(yǔ)，故用動(dòng)詞不定式to save。15．B解析：B【解析】句意：——Suzy,當(dāng)你離開(kāi)你的臥室時(shí)，為了節(jié)約能源，請(qǐng)關(guān)上燈。（動(dòng)詞不定式作狀語(yǔ)）14．D解析：D【詳解】句意：保羅做了一個(gè)漂亮的籠子養(yǎng)鳥(niǎo)，一直到它可以飛為止。如：Save energy, or it can run out soon. 這里有連詞連接，表示是句子與句子的關(guān)系，故用動(dòng)詞原形，表示祈使句?！军c(diǎn)睛】動(dòng)詞不定式作目的狀語(yǔ)和祈使句在具體語(yǔ)境中的使用，很多學(xué)生在做題時(shí)容易弄混。A. Saving，表示伴隨狀態(tài)；B. Save，表示祈使；C. To save，表示目的；D. Saved，表示被動(dòng)關(guān)系。故選A。本題考查can’t wait to do sth. 迫不及待地想做某事。tell常作及物動(dòng)詞，意為“講述，告訴”，常跟雙賓語(yǔ)。排除CD；這里是被邀請(qǐng)，用被動(dòng)語(yǔ)態(tài)，其結(jié)構(gòu)是be done的形式，排除A，根據(jù)題意，故選B。11．B解析：B【詳解】句意：我很榮幸被邀請(qǐng)?jiān)谶@里演講。此句pay attention to的賓語(yǔ)是what else，后面用不定式做目的狀語(yǔ)。我認(rèn)為是我們心情的變化。【點(diǎn)睛】do with和deal with是同義短語(yǔ)，意為“處理，對(duì)付”，do with常和what搭配使用；deal with常和how搭配使用。whether是否；why為什么；what什么；how怎樣。A. to laugh笑，不定式形式，B. laughing笑，動(dòng)名詞形式，C. laugh笑，動(dòng)詞原形，D. laughs笑，三單形式。8．C解析：C【詳解】句意：麥克斯是一個(gè)搞笑的男孩?！军c(diǎn)睛】tell用法： sb to do sth 告訴某人做某事； sb. ； sb about sth告訴某人有關(guān)某事； sth to sb把某事告訴某人。tell后接帶to的不定式做賓語(yǔ)補(bǔ)足語(yǔ)，to have 是told的賓語(yǔ)補(bǔ)足語(yǔ)。7．C解析：C【詳解】句意：—— 你今天為什么這么興奮？ ——因?yàn)槲覀儽桓嬷@個(gè)周末舉行學(xué)校旅行。考查非謂語(yǔ)動(dòng)詞。 ——那很好。根據(jù)題意，故選C。根據(jù)“you have to do something ahead of others”可知下文是動(dòng)詞不定式表示目的。考查非謂語(yǔ)動(dòng)詞。故選C。protect是動(dòng)詞原形，protecting是其現(xiàn)在分詞或現(xiàn)在分詞形式；to protect是動(dòng)詞不定式；to protecting是介詞后加動(dòng)名詞。4．C解析：C【詳解】句意：Sallie認(rèn)真地卷起她的新褲子以免上面落灰?？疾橐蓡?wèn)詞加不定式，to save動(dòng)詞不定式；saving動(dòng)名詞；saves動(dòng)詞三單形式；saved過(guò)去式。3．A解析：A【詳解】句意：我媽媽在日常生活中總是教我如何節(jié)約用水。此句省去了前面主句內(nèi)容，photos后為過(guò)去分詞短語(yǔ)做定語(yǔ)。2．D解析：D【詳解】考查語(yǔ)態(tài)。第二空表示目的，故用動(dòng)詞不定式to live。 collecting39．________ by green trees and lovely animals, the visitors to Cherry Trees Farm were quite relaxed.A．Surrounded B．Surround C．Surrounding D．To surround40．If you want to make yourself ______, you should speak clearly and slowly.A．to understand B．understood C．understand D．understanding41．Your hair is too long. You’d better _____.A．have it cut B．have cut it C．be cutting it D．to cut it42．I think middle school students should not get their hair _______.A．color B．colors C．colored D．coloring43．There is something wrong with his TV. He wants to get it _______ this afternoon.A．repairing B．repaired C．to repair D．repair44．There are no ways she can e up ________ herself out.A．with to help B．to help C．with helping D．to helping45．David practices________ the piano hard and often gives wonderful performances.A．play B．played C．playing D．to play46．—What happened to Lucy? I saw her _______ in her seat just now.—She failed in the final exam. Let’s go to cheer her up.A．crying B．to cry C．cried D．to be crying47．—Excuse me, can you explain the reason to me again?—Sorry, I know what I want to say but I have difficulty ______ myself clearly.A．express B．to express C．expressing D．to be expressed48．The girl is often seen ____in the art room.A．practice drawing B．practised drawingC．to practice drawing D．practice to draw49．His pronunciation is better, for he kept ______ a short passage after the tape every morning.A．to read B．readingC．read D．reads50．—Tom, have you ever read the book A Take of Two Cities written by Charles Dickens?—Yes, I finished ________ it last summer vacation.A．read B．reading C．to read D．reads51．Dear friends, ________ your best and relaxing yourselves are two helpful ways to get a high grade in this exam. Wish you success.A．try B．trying C．to try D．tries52．—It is reported that many sea animals have died because of waste masks.—People must stop ________ waste masks into the sea.A．collecting B．to collect C．littering D．to litter53．Peter enjoys ________ pictures in the country on Sundays.A．draw B．drawing C．to draw D．drew54．—Were you born in Qingyang City?—No, I wasn’t. But I have been used ________ in th