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(zhuǎn)換而來；第二空的from是有動詞短語escape from…轉(zhuǎn)換而來。句意：宇航員和科學(xué)家認(rèn)為黑洞是太空中的一個區(qū)域，物質(zhì)進入了那個區(qū)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(guān)系代詞的前面，定語從句的關(guān)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(jù)句子的意思選擇的介詞。

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