we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment
问题描述：
we have spent a lot of time in solving the()A.question B.problem C.competition D.entertainment
答
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
答
选A 疑难，复杂的问题。 problem多指算术题。
答
B
答
B
solve the problem 解决问题