1、Peter is b___ revising for a math test .He has no time to play.2、Three people sit in the b____of the car.
问题描述：
1、Peter is b___ revising for a math test .He has no time to play.
2、Three people sit in the b____of the car.
答
be busy doing
答
1、Peter is busy___ revising for a math test .He has no time to play.
2、Three people sit in the back____of the car.
答
1.busy
原因：bu busy doing 忙于做某事
2.back
in the back of the car 汽车后面
不明白的再问哟,请及时采纳,多谢!
答
1.busy
be busy doing 忙于做某事
2.back
in the back of 在……的后部
祝你开心。