He______ a well-meant but unsuccessful campaign to ease East-West tensions calling for arms reduction and a summit of the nuclea

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问题 He______ a well-meant but unsuccessful campaign to ease East-West tensions calling for arms reduction and a summit of the nuclear powers.

选项 A、embarked on
B、reckoned on
C、caught on
D、dwelt on

答案A

解析 embark on a campaign“发动了一场运动”;reckon on“依靠;指望”;catch on“理解,明白”;dwell on“详述”。
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