Paul _______ articles at 10:00 yesterday morning.

A. is writing B. writes C. was writing D. will write

C 【解析】句意：保羅昨天上午10點(diǎn)在寫文章。根據(jù)過(guò)去時(shí)間點(diǎn)at 10:00 yesterday morning可知此句時(shí)態(tài)應(yīng)是過(guò)去進(jìn)行時(shí)，其構(gòu)成：were /was + doing sth.，本句主語(yǔ)Paul三單，應(yīng)用was，故選C。

I like to sit on the beach and watch the sea water _______ and fall.

A. rise B. travel C. Climb D. run

A 【解析】句意：我喜歡坐在海灘上看海水的漲落。A. rise升起，增加，提高，不及物動(dòng)詞；B. travel旅行；C. Climb爬；D. run跑。根據(jù)fall（落下）結(jié)合句意可知填rise，選A。

_______ we came back to school, Dale was playing the violin.

A. When B. While C. Until D. After

A 【解析】句意：當(dāng)我們回到學(xué)校時(shí)，戴爾正在拉小提琴。A. When當(dāng)…時(shí)候，就在…時(shí)候；B. While當(dāng)…時(shí)候；C. Until直到，在…以前；D. After在…以后。when引導(dǎo)的時(shí)間狀語(yǔ)從句，通常主句用過(guò)去進(jìn)行時(shí)，從句用一般過(guò)去式，when這時(shí)的意思是就在這個(gè)時(shí)候，表示時(shí)間；while引導(dǎo)的短語(yǔ)或從句通常指時(shí)間段，引導(dǎo)時(shí)間狀語(yǔ)從句時(shí)，一般用過(guò)去進(jìn)行時(shí)，動(dòng)詞用延續(xù)性動(dòng)詞，主句既可用一...

I waited for the laughter to _______ before I spoke.

A. close down B. turn down

C. die down D. break down

C 【解析】句意：在我說(shuō)話之前，我等待笑聲消散。A. close down關(guān)閉，查封，倒閉；B. turn down關(guān)小，調(diào)低，拒絕；C. die down減弱，逐漸平息；D. break down損壞，分解，出故障。笑聲應(yīng)是消散或減弱，結(jié)合句意可知選C。

When the expert gave a talk, the meeting room was very quiet. All of us listened to him _______.

A. in a way B. in surprise C. in silence D. in a mess

C 【解析】試題分析：句意：當(dāng)專家作報(bào)告時(shí)，會(huì)議室里非常安靜。我們所有人都安靜的聽(tīng)。根據(jù)the meeting room was very quiet可知，大家都很安靜。A用一個(gè)方法B驚奇的C安靜地D一片混亂。故選B。

Why is the light on? I remember _______ it off when I left.

A. turning B. turn C. to turn D. turned

A 【解析】句意：為什么燈亮著？我記得我離開(kāi)的時(shí)候關(guān)掉了它。短語(yǔ)remember to do sth.：記著去做某事，這件事還沒(méi)做呢；remember doing sth.：記著做某事，這件事已經(jīng)做完了。根據(jù)上文“為什么燈亮著？”可知燈已經(jīng)關(guān)上了（做過(guò)了），故用remember to do sth.；選A。

It’s a good habit to wash your hands ________ you have meals.

A. unless B. while

C. when D. before

D 【解析】 試題分析：句意：飯前洗手是一個(gè)好習(xí)慣。unless除非；while當(dāng)……的時(shí)候； when當(dāng)……的時(shí)候；before在……之前。結(jié)合生活常識(shí)可知該選D。

(2016•安徽) For our own safety, it's important to ________ the traffic rules on the way to school.

A. follow B. change C. make D. break

A 【解析】試題分析：句意：為了我們自己的安全，在上學(xué)的路上遵守交通規(guī)則是重要的。A. follow跟隨，遵守；B. change改變，變化；C. make制作，使……；D. break打碎，弄破。結(jié)合句意，故選A。

(2016•銅仁) —We must be strict ________ ourselves.

—I think so.

A. with B. on C. in D. by

A 【解析】試題分析：句意：——我們一定要嚴(yán)格要求我們自己�！�—我也這樣認(rèn)為。be strict with sb對(duì)某人要求嚴(yán)格； be strict in sth對(duì)某事要求嚴(yán)格。此處接的賓語(yǔ)ourselves，故用介詞with, 故選A。

In Western countries，people start celebrating the New Year ________ 31st December.

A. in B. at C. on D. for

C 【解析】句意：在西方國(guó)家，人們?cè)?2月31日開(kāi)始慶祝新年。in+某年、某月或某個(gè)季節(jié)；at+具體的某一時(shí)刻；for+時(shí)間段；on+具體的某一天。這里有某月某日，指具體的某一天，所以應(yīng)該用介詞on，故選C。