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Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.

A.into; fromB.towards; towards
C.out of; fromD.through; through

A

解析試題分析:考察定語從句中的介詞。本題定語從句的先行詞是a region of space。第一空中的介詞into是由動詞短語fall into…轉換而來;第二空的from是有動詞短語escape from…轉換而來。句意:宇航員和科學家認為黑洞是太空中的一個區域,物質進入了那個區域以后就什么也逃脫不出來了。故A正確。
考點:考察定語從句中的介詞
點評:本題是把定語從句中的介詞提前到關系代詞的前面,定語從句的關系詞前面的介詞有三種來源:先行詞的固定搭配,定語從句中的固定搭配,以及根據句子的意思選擇的介詞。

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