第1个回答 2018-10-30
1, It’s dangerous to cross the road at the red light.追答
2, It is exciting to swim in the sea.
3, It is good to help old people.
4, It is hard to study English.
5, It is important to study politics.
6, It is interesting to skate in winter.
7, It is nice of you to help me .
如还有疑问，欢迎追问，有问必答！
第2个回答 2018-10-30
It is kind of Mary to always help others.追问
我要全部
每个都要
就是这样的
快点
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