题目内容

【题目】As the most exciting and traditional way to shop, street markets __________here and there in China these days.

A.findB.foundC.are foundD.were found

【答案】C

【解析】

句意:作为最让人兴奋和传统的购物方式,街市这些天在中国到处能被找到。

考查动词的时态和语态。find找到,一般现在时的动词原形;found动词的过去式;are found动词的一般现在时的被动结构;were found动词的一般过去时的被动结构。根据these days可知讲述的是现在的动作,用一般现在时;主语street markets和动词find之间是被动关系,用一般现在时的被动are found。故选C

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【题目】 When it comes to long-distance space travel, the biggest problem is that spaceships can only get as far as the fuel onboard allows. In 1964, a British writer Clarke came up with the idea of “solar sailing” in his science fiction. He wrote of large, mirror-like sails that collect power from the sun and free spaceships from the limitation of fuel.

This sci-fi idea was first successful brought to reality in 2010 by Japan’s IKAROS satellite. Ever since then, the technology has improved mission by mission, with the latest being NASA’s Advanced Composite Solar Sail 3(ACS3). NASA has recently announced that it’s going to team up with Lithuania’s satellite-building company NanoAvionics to test its new sail in Low-Earth Orbit.

To many, a solar sail may look like a giant solar panel, but it actually works very differently. While solar panels take in energy from the sun and change it into power, solar sails use Photons given off by the sun to create direct power. Besides, solar panels are big and heavy to carry, while solar sails are just the opposite.

According to Abbott, the CEO of NanoAvionics, the upcoming Low-Earth Orbit trial with NASA, if successful, will be followed with deep-space missions that involve larger solar sails. These are ideal for low-cost and long-distance space travel because fuel will no longer be a problem.

“It started as a sci-fi dream,” Popular Mechanics reporter Jennifer Leman wrote. “Now it could be the future of space flight.”

1What can we say about solar sailing according to the first two paragraphs?

A.It was widely used in space travel.

B.It was tried by IKAROS satellite.

C.It was from the creative idea by Clarke.

2Which of the following words best describe solar sails compared with solar panels?

A.Big and heavy.B.Small and light.C.Powerful and large.

3What does the underlined word These in paragraph 4 refer to?

A.Larger solar sails.B.Deep-space missions.C.Long-distance space flights.

4What is the best title for the text?

A.Solar Sail: the Latest Technology

B.Solar Sail: from Dream to Reality

C.Solar Sail: a New Kind of Spaceship

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