At present, many of the earth's species have died 1 , and others are 2 . Animals and plants must have 3 and clean habitat , 4 there is enough food and other resources. When the 5 is changed or destroy 题目和参考答案——青夏教育精英家教网—

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　　At present, many of the earth's species have died 1 , and others are 2 . Animals and plants must have 3 and clean habitat (栖息地) , 4 there is enough food and other resources. When the 5 is changed or destroyed, they have to either adapt to (适应) the change or 6 a anew home. When a new species (物种) is too strong, some original. (原始的；最初的) species may be 7 . 8 all the living things around us, we human beings could not survive (生存) . Therefore we should take 9 to keep animals and plants 10 becoming endangered.

(1) A．off

B．out

C．down

D．away

(2) A．endangered

B．dangerous

C．danger

D．endangering

(3) A．warm

B．cold

C．cool

D．comfortable

(4) A．when

B．where

C．which

D．that

(5) A．climate

B．weather

C．temperature

D．environment

(6) A．find

B．change

C．leave

D．return to

(7) A．dangerous

B．in danger

C．safe

D．danger

(8) A．With

B．Without

C．For

D．In

(9) A．steps

B．measures

C．action

D．A、B and C

(10) A．on

B．in

C．from

D．Of

答案：B;A;D;B;D;A;B;B;D;C
解析：

(1) 考查短语辨析。die out意为“灭绝”；die off意为“相继死去”；die down意为“渐渐变弱”；die away意为“渐渐消失”，由以上及句意可知B正确。

(2) 考查词汇。endangered意为“濒危的；要灭绝的”，danger“危险”，dangerous意为“危险的”。故A正确。

(3) 考查句意理解。句意为“动植物必须有舒适、干净的栖息地”。可知D正确。

(4) 考查定语从句。先行词habitat在后面宾语从句中作地点状语，故B正确。

(5) 考查句意理解。由句意“当环境改变或被毁时……”可知D正确，D项是A、B、C三项的综合。

(6) 考查句意理解。由上下文可知句意为“它们得适应这种改变或找到一个新家”。故A正确。

(7) 考查根据句意进行选择。由上下文可知此句应为“……原始的物种处于危险中”。故B正确。

(8) 考查句意理解。由上下文可知B正确。句意为“没我们周围的这些生物，我们人类就不能生存”。

(9) 考查固定短语。take steps /measures /action意为“采取行动／措施”。故D正确。

(10) 考查介词的习惯用法。keep sb /sth from doing sth意为“阻止某人做某事或阻止某事发生”，故C项正确。

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