environmental damage is done, it takes many years for the ecosystem to recover. A．Even if B．If only C．While D．Once 题目和参考答案——青夏教育精英家教网—

题目内容

_______environmental damage is done, it takes many years for the ecosystem to recover.

A．Even if

B．If only

C．While

D．Once

解析试题分析：考查连词辨析。A即使，尽管；B要是…就好了；C当…时；然而；尽管；D一旦；句意：一旦环境被破坏，就要花很多年的事件让生态系统恢复过来。
考点：考查连词辨析
点评：此题主要考查连词的辨析，选择连词主要是看前后句的关系，因果关系用表因果的连词，转折关系用转折连词，并列关系用并列连词，要求考生具有一定的句子分析能力和词义辨析能力。

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(1)

What is special about the car Helios in the text?
[　　]
A．	It was built by middle school students．
B．	It has an attractive design．
C．	It was made in 1971．
D．	It won the fourth prize．

(2)

How many sun-powered cars took part in the race?
[　　]
A．	1
B．	4
C．	23
D．	44

(3)

What would be the best title for the text?
[　　]
A．	The Making of Helios．
B．	1999 American Tour de Sol．
C．	Sun-powered Gars on the Road．
D．	Use of Green Cars in Connecticut．

(4)

The students felt proud of Helios because ________．
[　　]
A．	it could run as far as 350 miles
B．	it was favored by many children
C．	it had high-quality batteries
D．	it was driven by clean energy

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