I purposely ______ from extending these observations to any length.A、abstainB、s

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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

解析此题考查同词根动词辨析。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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