They _______books every day in the library.A.reads B.read C.reading 说理由

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They _______books every day in the library.A.reads B.read C.reading 说理由

They _______books every day in the library.A.reads B.read C.reading 说理由
They _______books every day in the library.A.reads B.read C.reading 说理由

They _______books every day in the library.A.reads B.read C.reading 说理由
B
主语是they,动词用原形

B
every day 是一般现在时的标志,主语是复数,实义动词作谓语不用变

B 因为they是第三人称复数 不能选A C是现在进行时,而这个句子是一般时态,如果要选C,应该还要有be动词are

选B 这里明显缺一个谓语,C是非谓语,排除,本句子主语是They,所以谓语是复数,A用在第三人称单数。