we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment

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we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment
we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment

we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment
B

B
solve the problem 解决问题

选A 疑难,复杂的问题。 problem多指算术题。

通俗的解释,question是用来 answer的 ,问题是用来回答的,而problem是用来solve的,难题是用来解决的。C是竞争,比赛的意思 D是娱乐或者娱乐设施的意思