Tom knew nothing about it ________ his sister told him.

A. since B. if C. until D. as

C 【解析】句意：汤姆直到他的姐姐告诉他，他才知道那件事的。A. since自从； B. if如果； C. until，前面有否定词nothing，“直到……才”；D. as因为，当……时候。因为空格前面有否定的含义：汤姆不知道那件事。所以是在姐姐告诉之前不知道。根据句意故选C。

I'd like you ________ for a picnic with us.

A. go B. to go C. going D. went

B 【解析】句意：我想要你和我们一起去野餐。I'd=I would，would like to do sth想要做某事；go for a picnic with sb.和某人一起去野餐；would like sb. to do sth. 想要某人做某事。故选B。

Jim，I'm too tired. May I stop ________ a rest?

A. having B. have C. to having D. to have

D 【解析】句意：Jim，我太累了，我可以停下来休息一下吗？tired形容词， “累的”，too“太”，副词，修饰形容词tired；have a rest休息；stop to do sth.停下来去做某事；stop doing sth停止正在做的事情。根据I'm too tired累了，所以应该要做的事情是休息一下。故选D。

Brian puts the cardboard on the top of the jar and ________.

A. turns over it B. turns it over

C. turns them over D. turns over them

B 【解析】句意：Brian在罐子上面放了一个硬纸板并且又把它翻过来了。on the top of在……顶部；cardboard硬纸板，是单数；下文应该用代词it来代替，不能用复数形式的them，故排除CD； turn over翻过来，是动副结构的短语，代词作宾语时要放在动词和副词之间。故排除A；故选B。

—3?D printing could be used to build a house in less than 24 hours.

—It ________ amazing. It's my first time to get to know this.

A. sounds B. smells C. tastes D. looks

A 【解析】句意：--3D打印机在不到24小时之内能够建好一个房子。--听起来真令人吃惊，这是我第一次了解到这件事的。A. sounds听起来； B. smells闻起来； C. tastes尝起来； D. looks看起来。这里it指的上面提到的那件事3?D printing could be used to build a house in less than 24 hours，这件事应...

Lily，please ________ your new storybook here tomorrow.

A. bring B. to bring C. take D. to take

A 【解析】句意：Lily，明天请带上你的新故事书到这里来。bing带来,指把东西带到说话的地方来；take带走，指的是把东西带离说话的地方。根据here可知，应该指的是把东西带到说话的地方。应该用bring；故排除CD；空格前没有主语，这里是祈使句，所以应该用动词原形开头。故排除B；故选A。

We'll go to the park ________ there is a heavy rain tomorrow.

A. unless B. since C. as soon as D. if

A 【解析】句意：如果明天没有大雨，我们将去公园。A. unless除非，如果不； B. since自从，既然； C. as soon as一……就； D. if如果。根据We'll go to the park我们去公园；所以空格后应该是不下雨。故选A。

The elephant has ________ a strong body ________ it can do heavy work for people.

A. so; that B. such; that C. such; so D. so; and

B 【解析】句意：大象有如此强壮的身体以至于它能为人们做很重的工作。so...that...句型中的so是副词，常常用来修饰形容词或副词，意思是“如此/这么……以致于……”1.常用句型为：主语+谓语+so+adj./adv.+that从句。2.so+形容词+a(n)+单数名词+that从句。例如：She made so good a meal that we all ate far too ...

—What kind of TV shows do you prefer?

—I like the ones ________ make me laugh.

A. who B. whom C. that D. what

C 【解析】句意：--你喜欢哪种电视节目？--我喜欢那种使我笑的节目。________ make me laugh 是定语从句。A. who是定语从句的关系代词，指人的；在句中作主语； B. whom是定语从句的关系代词，指人的；在句中作宾语；C. that是定语从句的关系代词，指人或物；在句中作主语或宾语； D. what不能引导定语从句。故排除D；第二句中的the ones代替前面出现的...

—We have sixty students in our class. ________ of them are boys. How many girls are there, do you know?

—There are twenty girls.

A. One third B. Two thirds C. One quarter D. A half

B 【解析】句意：--在我们班里有60名学生，他们中三分之二都是男生，有多少女生呢，你知道吗？--有20名女孩。A. One third 三分之一； B. Two thirds三分之二；C. One quarter四分之一； D. A half一半。根据We have sixty students in our class.班里共有60名学生，There are twenty girls.2...