Question

【題目】

Doing experiments is one of the most interesting things about studying chemistry. In China, it’s often teachers who do the experiment in the front of the class with students_________. But in the US, students take action by themselves.

The first time I took a class in my school’s chemistry lab, I was surprised to find that students were wearing special glasses, plastic gloves, as if there had been a bio-chemical attack! _________is always the most important for science lab classes in America. The outfit（裝備）prevents us from harmful chemical materials.

My chemistry teacher usually gives us the instruction sheet the night before the lab class to let us know a lot about the experiments. During the class, she first_________the steps of the experiments and then puts us into groups to do the experiments. What’s special is that for every lab class, she changes everyone’s partner to let us work with_________classmates.

The class is often filed with laughs. Once we tried to bum chemicals. The chemicals produced many colors of fames（火焰）, _________bright orange and dark green. Many students in my class were amazed. “Wow! That’s so beautiful! ” they screamed.

After finishing an experiment, we need to write a detailed report. It consists of the steps, our feelings and the final results. If there has been a mistake in the experiment, we need to analyze（分析）why it happened and_________we should do to correct it. The reports are important. They make up around 25 percent of our term grade.

【1】A.playingB.watchingC.singingD.sleeping

【2】A.FunB.TimeC.MoneyD.Safety

【3】A.wait forB.care forC.go overD.clean out

【4】A.differentB.sameC.tallD.clever

【5】A.duringB.fromC.throughD.including

【6】A.howB.whatC.whereD.when

Answer 1

【答案】

【1】B

【2】D

【3】C

【4】A

【5】D

【6】B

【解析】

本文講述了作者在美國學(xué)校里如何上化學(xué)實(shí)驗(yàn)課。

【1】句意：在中國，通常是老師在學(xué)生面前做實(shí)驗(yàn)，學(xué)生們看著。

playing玩耍；watching觀看；singing唱歌；sleeping睡覺。根據(jù)下一句“But in the US, students take action by themselves.”可知，但是在美國，學(xué)生們是自己動(dòng)手做實(shí)驗(yàn)，but表示前后轉(zhuǎn)折，所以此處是“老師做實(shí)驗(yàn)，學(xué)生們看著”，所以此處用watching。故選B。

【2】句意：在美國，安全一直是科學(xué)實(shí)驗(yàn)課最重要的。

Fun樂趣；Time時(shí)間；Money金錢；Safety安全。根據(jù)下一句中“The outfit（裝備）prevents us from harmful chemical materials.”可知，這套裝備可以防止我們，接觸到有害的化學(xué)物質(zhì)，所以此處是“安全最重要”，所以此處使用safety。故選D。

【3】句意：在課堂上，她首先復(fù)習(xí)了實(shí)驗(yàn)步驟，然后把我們分組做實(shí)驗(yàn)。

wait for等待；care for照顧；go over復(fù)習(xí)；clean out掃除。根據(jù)上一句中“My chemistry teacher usually gives us the instruction sheet the night before the lab class to let us know a lot about the experiments.”可知，實(shí)驗(yàn)課的前一天晚上，我的化學(xué)老師會(huì)給我們發(fā)一份關(guān)于實(shí)驗(yàn)的說明，所以此處是“開始實(shí)驗(yàn)之前先復(fù)習(xí)實(shí)驗(yàn)步驟”，所以此處用go over。故選C。

【4】句意：特別之處在于，每個(gè)實(shí)驗(yàn)課，她都會(huì)換搭檔，讓我們和不同的同學(xué)一起工作。

different不同的；same相同的；tall高的；clever聰明的。根據(jù)句中“she changes everyone’s partner”可知，化學(xué)老師換了每個(gè)人的搭檔，所以是“讓我們和不同的同學(xué)一起工作”，所以此處使用different。故選A。

【5】句意：這些化學(xué)物質(zhì)產(chǎn)生了許多種顏色的火焰，包括亮橙色和深綠色。

during在……期間；from自從；through通過；including包括。根據(jù)句中“The chemicals produced many colors of fames”可知，這些化學(xué)物質(zhì)產(chǎn)生了許多顏色的火焰，其中就包括亮橙色和深綠色，所以此處使用including。故選D。

【6】句意：如果實(shí)驗(yàn)中有錯(cuò)誤，我們需要分析為什么會(huì)發(fā)生，以及我們應(yīng)該做什么來糾正它。

how怎么樣；what什么；where哪里；when什么時(shí)候。根據(jù)句中do可知，此處是“我們應(yīng)該做什么糾正它”，此處使用what符合題意。故選B。