The old man______ traveling by air, for he had a serious heart disease.

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问题 The old man______ traveling by air, for he had a serious heart disease.

选项 A、didn’t use to
B、hasn’t used to
C、hadn’t used to
D、wasn’t used to

答案D

解析 这位老人不习惯乘飞机旅行,因为他有很严重的心脏病。短语be used to (doing)sth.意为“习惯(做)某事”; used to do sth.“过去常常做某事”。
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