They have been doing their homework
They have been doing their homework
能改成：
he has been doing their homework 嗎?
have改成了has
能改成：
he has been doing their homework 嗎?
have改成了has
英語人氣：388 ℃時間：2020-03-29 05:28:04
優(yōu)質解答
he has been doing his homework
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