He didn't answer the phone immediately as he was ( ) on a difficult maths problem.
A.busy to work B.busy with work C.busy working D.busying
人气：497 ℃ 时间：2020-04-04 12:50:53
解答
c 必须的!为什么？谢谢！be busy doing sth 其实也可以是 be busy (in) doing sth. 意为忙于做某事。
be busy to do sth.如果是 be too busy to do sth.
那就是too...to...结构了，可以这样用，太忙了以至于不能干什么。
work on 的work做名词才是
所以c
推荐
- He telephoned agin.but i didn't answer the phone!
- I didn't answer the phone( )I didn't hear it ring
- I tried to ____you at home,but you didn't answer the phone
- The phone is ringing,but no one answer the phone.语法有无错啊?
- why didn't you answer the phone lase night?
- dutch 到底是德国还是荷兰?
- 先观察有什么规律,填写空格-1,1,0,1,1,2,( ),5,
- 急死啦,英语词
猜你喜欢
