They _ reading newspapers. ( )A.am B...

2023-01-12

【题目】They ___ reading newspapers. (   )

A.am B.is C.be D.are

【答案】D

【解析】

句意:他们正在读报纸。be动词用法:I用am,you用are, he/she/it等单数主语用is,复数用are。本题主语为they,所以be动词用are,故选D。