题目内容
His father and mother ____ teachers.
A.are all | B.are both | C.both are | D.all are |
B
试题分析: both常放在be动词之后, 表示“两者都是……”。all指“三者或三者以上都是……”,句意:他的爸爸和妈妈都是老师,故选B。
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题目内容
A.are all | B.are both | C.both are | D.all are |