题目内容

【题目】My brother bought a telescope, ______ he could study the star in the night sky.

A.of whichB.through whichC.in whichD.on which

【答案】B

【解析】

考查定语从句。句意:我哥哥买了一架望远镜,通过它他可以研究夜空中的星星。介词through 表示“通过/凭借(某种方式/方法)”;短语through the telescope意思为“通过望远镜”。分析句子结构,“______ he could study the star in the night sky是非限制性定语从句,先行词是a telescope,指物,作介词through的宾语,因此用“介词through+which”引导非限制性定语从句。故选B项。

练习册系列答案
相关题目

【题目】Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

Pumas are large, cat-like animals which are found in America. When reports came into the London Zoo that a wild puma 1 (spot) forty miles south of London, they were not taken seriously. However, as the evidence began to accumulate, experts decided to investigate.

The hunt 2 the puma began in a small village where a woman 3 (pick) blackberries saw “a large cat” only five yards away from her. It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being 4 it is cornered. The search proved difficult, for the puma was often observed at one place in the morning and at 5 place twenty miles away in the evening. 6 it went, it left behind it a trail of dead deer and small animals like rabbits. Several people complained of cat-like noises at night and a businessman on a 7 (fish) trip saw the puma up a tree.

The experts were now fully convinced that the animal was a puma, 8 where had it come from? As no pumas had been reported missing from any zoo in the country, this one 9 have been in the possession of a private collector and somehow managed to escape. The hunt went on for several weeks, but the puma was not caught. It is disturbing 10 (think) a dangerous wild animal is still at large in the quiet countryside.

【题目】 Dry ice is carbon dioxide in frozen form, with a temperature of about -78.3. 1 Instead, when dry ice melts, it turns into a gas. So when you see dry ice “smoking”, it’s frozen carbon dioxide melting into its gaseous state. Dry ice is a popular matter in science experiments and for a good reason. It creates projects that look cool.

Experiment: Healthy Dry Ice Yogurt Popsicles (冰棍)

This dry ice experiment is a simple project, but it’s certainly wonderful. 2 Even kids as young as five will at least appreciate the observations. It should take you about 10 minutes or less to have a frozen treat to enjoy.

Materials

One large block of dry ice

Large spoon or tube-shaped piece of metal

Four Popsicle sticks

One cup of your favorite juice

Tall glass filled with water

Directions

Use the large spoon, or tube-shaped piece of metal to make a Popsicle-shaped hole in the middle of the block of dry ice. You can set the ice on a towel on your counter to do this work. 3

Add a Popsicle stick to the middle of the space so that when you pour in the liquid, it will freeze around the Popsicle stick.

4 After several minutes, remove the Popsicle from the block of dry ice and dip it into a tall glass of water. Do this to warm up the Popsicle just a bit first. 5 You are sure to succeed!

A. Prepare all the necessary materials.

B. Otherwise, it will be too cold to enjoy.

C. It has appeal to a wide range of audiences.

D. Unlike regular ice, dry ice doesn’t melt into a liquid.

E. Keep in mind that it’s okay if it’s not exactly Popsicle-shaped.

F. The number of experiments you can perform using dry ice is endless.

G. Hold the Popsicle stick in place and wait a few minutes for your Popsicle to harden.

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网