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

A．hadn’t thoughtB．haven’t thoughtC．didn’t thinkD．wasn’t thinking

C

解析這題考查時(shí)態(tài)的用法：句意是：--你可以發(fā)現(xiàn)107頁的數(shù)學(xué)問題的答案。--啊，這么簡單。我想知道為什么沒想到。說明是過去沒想到，說明過去沒想到，現(xiàn)在想到了。選C。

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