—You may find the key to the math problem on page 107.—Ah, it’s so simple. I wonder why I _____ of that.
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A
hadn’t thought
B
haven’t thought
C
didn’t think
D
wasn’t thinking
推荐题目
 Mary realized she ______.
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A
was playing a joke about
B
was making fun
C
was being made fun of
D
was made fun
.The moment I arrived there, I found all the food supplies had ______.
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A
used up
B
ran out of
C
given out
D
given away