I'm watching the boy and the dog ___are playing on the playground_英语解答

I'm watching the boy and the dog ___are playing on the playground
A that B who C which Dwho and which

人气：497 ℃　时间：2020-01-28 13:52:20

解答

A
这是一种特殊的情况,如果既要只带人又要指代物,就应该用that
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