选 A
这句话写成it is not easy to work out the maths problem.就容易理解了
有什么疑问还可以问我,帮助到你的话请及时采纳.O(∩_∩)O谢谢
The maths problem is not easy( )
The maths problem is not easy( )
A.to work out B.to be work out C.worked out D.working out
A.to work out B.to be work out C.worked out D.working out
英语人气：233 ℃时间：2020-05-11 00:59:25
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