Please listen carefully while others ______.A、speakB、speakingC、spokenD、spoke

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问题 Please listen carefully while others ______.

选项 A、speak
B、speaking
C、spoken
D、spoke

答案 B

解析在while 引导的状语从句中，动词必须是延续性的，这里others后省略了are。例如：While trying to open the can，I cut my hand.(当我试着打开罐头时，我把手割伤了。)故选B。

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