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While watthing television,________

[  ]

A.the doorbell rang

B.the doorbell rings

C.we heard the doorbell ring

D.we heard the doorbell rings

答案:C
解析:

此题while watching television实为状语从句的一种省略形式,补全后应为while we were watching television,而此种省略形式只有满足两个条件时方成立,即(1)主从句的主语一致(2)从句谓语含动词be,所以主句主语一定是we,排除A、B两项,再据hear sb.Do,便可确定答案。


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