2．There are over 58，000rocky objects in _______ space，about 900of which could fall down onto _______ earth．（　�。�
A．the； theB．不填； theC．the； 不填D．a； the

分析 句意：在太空里有58，000個(gè)巖石體，大約有900顆可能會(huì)落到地球上．

解答 答案：B．第一空考查固定搭配in space在太空；第二空，表示世界上獨(dú)一無(wú)二的東西用定冠詞the，所以the earth特指地球．故選B．

點(diǎn)評(píng) 本題考查冠詞的辨析，冠詞的用法集中在the表示特指，a/an表示泛指，以及冠詞的固定搭配和零冠詞的情況．

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