How much         this pair of pants?
A．a(chǎn)reB．isC．a(chǎn)mD．it’s
B

試題分析：句意：這條褲子多少錢？這個句子的主語是this pair of pants，謂語動詞的單復數(shù)應該根據(jù)pair來確定，這里pair是單數(shù)，所以謂語動詞應該用單數(shù)，故選B。
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