---YoumayfindthekeytothemathsproblemonPage10  ---Ah,it...

问题详情：

 --- You may find the key to the maths problem on Page 10

   --- Ah, it’s so simple. I wonder why I _____ of that

   A. hadn’t thought   B. haven’t thought   C. didn’t think    D. wouldn’t think

【回答】

C

知识点：动词时态与语态

题型：选择题