【題目】— Mabel, did you catch a cold again?
—Yes. I didn't realize the importance of doing enough exercise.
A.was afraid of
B.was unaware of
C.was worried about

【答案】B
【解析】句意：——Mabel，你又感冒了嗎？——是的，我沒有意識到做運動的重要性。didn't realize=be unaware of意為“沒有意識到”，A.害怕； C.擔心，故選B。

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