题目内容
【题目】There is a______ on the desk.
A.cups
B.book
C.rulers
【答案】B
【解析】句意:书桌上有一本书。不定冠词a表示泛指,其基本词义是“一……”,后跟可数名词的单数形式。A. cups杯子,复数形式;B. book书,单数形式;C. rulers尺子,复数形式。只有book书是单数形式,故选B。
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