In order to find the missing child,villagers()all they can over the past five hours.had done/have been doing
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In order to find the missing child,villagers()all they can over the past five hours.had done/have been doing
In order to find the missing child,villagers()all they can over the past five hours.
had done/have been doing
In order to find the missing child,villagers()all they can over the past five hours.had done/have been doing
have been doing
现在完成进行时~有持续做下去的意思
为了找到丢失的小孩,所有村民都找了五个小时了(还可能继续找下去)
have been doing
over the past five hours.这个短语要用现在完成时,所以只有选后者
have been doing