,thismathproblemseemedquitesimpletome,butwhenItri...

问题详情：

      , this math problem seemed quite simple to me, but when I tried to work it out, I just couldn’t.

There are always things like this, I think.

       A. On its own            B. On one hand          C. In my opinion        D. At first sight

【回答】

知识点：词组 短语

题型：选择题