— You may find the key to the maths problem on page 107.— Ah, it's so simple. I wonder why I __

题目简介

— You may find the key to the maths problem on page 107.— Ah, it's so simple. I wonder why I __

题目详情

— You may find the key to the maths problem on page 107.
— Ah, it's so simple. I wonder why I _____ of that.
[     ]

A. hadn't thought
B. haven't thought
C. didn't think
D. wasn't thinking

题型:单选题难度:中档来源:0116 模拟题

答案

C

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