There are over 58,000 rocky objects in ______ space, about 900 of which could fall down onto ______ earth.
A．the; theB．/; theC．the; aD．a(chǎn); /
B

試題分析：考查冠詞：第一空不填，in space在太空，第二空填the，世界上獨(dú)一無(wú)二的東西，如the earth，the sun要加定冠詞the，選B。
點(diǎn)評(píng)：冠詞的辨析集中在the表示特指，a/an表示泛指，以及冠詞的一些固定搭配和不使用冠詞的情況。
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