题目内容

_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.

A. For the first time B. The first time

C. At first D. It was the first time

 

B

【解析】

试题分析:句意:我第一次去汉中的南湖就被其美景深深吸引。A项for the frist time “第一次” 做时间状语,B项连词词组,引导一个句子,C项“首先”做时间状语,D项引导表语从句。故选B

考点:考查近义词组用法区别

 

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Anne Sanders was practicing soccer moves, which was not normal. Usually, Anne only plays basketball. She wins every basketball game she plays, and she loses at any other game. "Anne", I waved to her. "Why are you playing soccer?"

"Well, the gym teacher is doing something different," she said. "There are teams of four and partners of two.We get to pick our partners, and I want someone to pick me. "Anne held up a list.

"It looks like I'm on a team with you, Stacey, and Paul," I said. "Stacey is my best friend.Maybe we can be together: " Just then, Stacey and Paul came over. They had heard of the teams.

"Do you want to be partners, Stacey?" I asked.

"Well, I was going to be partners with Paul," she claimed. I didn't blame her. Paul was as fast as a rocket, and my nickname was "Snail". "But we are best friends," said Stacey. “So I guess I'II be with you. "

It was our first game. Stacey went to talk to some other friends afterwards, and Paul and Anne were talking about winning their game. I was sipping on my water, when I overheard Stacey, "She's worse than I thought; if I played the team alone,, I would have won easily. She's worse than a snail. She's more like a statue. "

That night, I felt terrible for losing and mad at Stacey for calling me a statue. After all, she was my best friend and my only friend. Anyway, the phone rang, and it was Stacey. At first, I thought she might apologize, but no such luck.

“Allison, the game tomorrow is canceled, " she said.

"Okay," I replied. "Sorry about the game today", Stacey hung up on me.

The next day, I went over to the soccer field. I knew the game was canceled, but maybe I could help clean up.But instead of a mess, I saw a soccer game in progress. Stacey and were playing, and Anne was hiding in the corner. "Paul made me pretend to be sick, " she whispered. “He wants to play with Stacey because she's so fast. "

So Anne and I went to get ice cream. Even if I lost Stacey ,I just created a lifelong friendship.

1.Why did Anne practice playing soccer?

A. Because she wanted to win in all games.

B. Because she didn't want to be left out.

C. Because she intended to be a normal student.

D. Because she hoped to do something different.

2.What did Stacey complain about Allison?

A. Allison called her nickname.

B. Allison was as fast as a rocket.

C. Allison didn't treat her as a best friend

D. Allison moved too slowly in the game.

3.Stacey phoned Allison in order to

A. get rid of Allison as a partner

B. apologize for calling Allison a statue

C. tell Allison there was no game tomorrow

D. encourage Allison to fight in the next game

4.Allison went to the soccer field to________

A. watch a soccer game

B. keep the soccer field clean

C. find out Why the game was cancelled

D. make preparations for another game

5.What conclusion can we draw from this passage?

A. Allison wanted to be partners with Anne.

B. Stacey called Allison to show real concern.

C. Allison and Anne would be friends forever.

D. Anne was hiding in the corner because she was sick.

 

Most people know precious gemstones (宝石) by their appearances. An emerald flashes deep green, a ruby seems to hold a red fire inside, and a diamond shines like a star. It’s more difficult to tell where the gem was mined, since a diamond from Australia or Arkansas may appear the same to one from the Democratic Republic of the Congo. However, recently, a team of scientists has found a way to identify a gemstone’s origin.

Beneath the surface of a gemstone, on the tiny level of atoms and molecules(分子), lie clues (线索) to its origin. At this year’s meeting of the Geological Society of America in Minneapolis, Catherine McManus reported on a technique that uses lasers (激光) to clarify these clues and identify a stone’s homeland. McManus directs scientific research at Materialytics, in Killeen, Texas. The company is developing the technique. “With enough data, we could identify which country, which mining place, even the individual mine a gemstone comes from,” McManus told Science News.

Some gemstones, including many diamonds, come from war-torn countries. Sales of those “blood minerals” may encourage violent civil wars where innocent people are injured or killed. In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.

To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown spectroscopy. Just as heat can turn ice into water or water into steam, energy from the laser changes the state of matter of the stone. The laser changes a miniscule part of the gemstone into plasma, a gas state of matter in which tiny particles(微粒)called electrons separate from atoms.

The plasma, which is superhot, produces a light pattern. (The science of analyzing this kind of light pattern is called spectroscopy.) Different elements produce different patterns, but McManus and her team say that gemstones from the same area produce similar patterns. Materialytics has already collected patterns from thousands of gemstones, including more than 200 from diamonds. They can compare the light pattern from an unknown gemstone to patterns they do know and look for a match. The light pattern acts like a signature, telling the researchers the origin of the gemstone.

In a small test, the laser technique correctly identified the origins of 95 out of every 100 diamonds. For gemstones like emeralds and rubies, the technique proved successful for 98 out of every 100 stones. The scientists need to collect and analyze more samples, including those from war-torn countries, before the tool is ready for commercial use.

Scientists like Barbara Dutrow, a mineralogist from Louisiana State University in Baton Rouge, find the technique exciting. “This is a basic new tool that could provide a better fingerprint of a material from a particular locality,” she told Science News.

1.We learn from Paragraph 1 that __________.

A. an emerald and a ruby are names of diamonds.

B. it’s not difficult to tell where the gem was mined.

C. appearances help to identify the origin of gemstones.

D. diamonds from different places may appear the same.

2.Why did the U.S. government pass law that requires companies selling gemstones to determine the origins of their stones?

A. To look for more gemstones.

B. To encourage violent civil wars.

C. To reduce the trade in blood minerals.

D. To develop the economy.

3.Which of the following facts most probably helps McManus and her team in identifying the origin of stones?

A. Heat can turn ice into water or water into steam.

B. Gemstones from the same area produce similar light patterns.

C. Laser can change a miniscule part of the gemstone into plasma.

D. Materialytics has already collected patterns from thousands of gemstones.

4.From the last two paragraphs, what can be inferred about the laser technique?

A. It is ready for commercial use.

B. People can use the new tool to find more gemstones.

C. It can significantly reduce the gemstones trade in blood minerals.

D. It will bring about a revolutionary change in identifying the origin of minerals.

5.The author wrote this passage mainly to __________.

A. tell us how to identify the origin of diamonds.

B. introduce a laser technique in identifying a stone’s origin

C. prove identifying the origin of gemstones are difficult

D. attract our attention to reducing trade in blood minerals

 

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