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____no need for us to discuss the problem again since it has already been solved.

A.It has B.There has C.We have D.There is

解析:

句型:there is no need(for sb)to do sth。

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　　A spirit of adventure, curiosity about different cultures and the desire for a challenge can e found in young people everywhere．More and more students in China are backpacking around the country．

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