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精英家教網 > 高中英語 > 題目詳情

Polar bears live mostly on _____ sea ice, which they use as ___ platform for hunting seals.

   A. a; a       B. a; the     C. 不填;a    D. the; 不填

C


解析:

sea ice 海冰, 是固定結構,不用冠詞;platform平臺,是可數名詞。

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