题目内容
—What ____ this in English?
—It _____ a book.
—It _____ a book.
A.is, am | B.is, are | C.are, is | D.is, is |
D
本题的主语是this或is都为单数第三人称,be动词都要用is,故本题选D。
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题目内容
A.is, am | B.is, are | C.are, is | D.is, is |