2. 外语
  3. I purposely ______ from extending these observations to any length.

I purposely ______ from extending these observations to any length.

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问题 I purposely ______ from extending these observations to any length.
选项 A、abstain
B、sustain
C、retain
D、detain
答案A
解析 动词辨析题。abstain是不及物动词，abstain from为固定搭配，意思是“避免，戒除 (烟、酒等)，弃权”。其他三个词均是及物动词。sustain的意思是“支撑，撑住，维持，持续”；retain意思是“保持，保留，雇用(律师)”；detain意思是“拘留，留住，阻止”。
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