They ___(clap) their hands happily when I came into the classroom

问题描述:

They ___(clap) their hands happily when I came into the classroom

clapped

时态应该是过去进行时,表示我进
去教室的时候他们正高兴地拍手。应该是:
were clapping
望采纳

时态应该是过去进行时,表示我进去教室的时候他们正高兴地拍手.
所以应该是:
were clapping

were clapping