1）我可以再问你一个问题吗?
译：Can I ask you another question?(right)
2）这些书你可以借两个星期.
译：You can keep these books for two weeks.(complete right)
3）他能和我们一起去图书馆吗?他不能.但苏珊可能能去.
译：Can he go to the library with us?No,he can't.But Susan may go.(also right)
4）我可以过几天还你这本历史书吗?
译：Can I give this history book back to you in some days?
5）如果你不能用英语回答这个问题,你可以用中文.
译：If you can't answer this question in English,you can use Chinese.(Excellent)