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Afteranearthquake,therobotcouldhelplookforthepeople(trap)underabuilding.为什么不是betrapped

题目详情
After an earthquake,the robot could help look for the people_____ (trap) under a building.
为什么不是be trapped
▼优质解答
答案和解析
以下两种都行trapped
who were trapped, (这种如果把who were 去掉就是第一种了,记住,定语从句的从句如果要去掉主谓语都要一并去掉)