The child sat in the dentist's chair ,A trembleB tremblingC trembledD to trembled好像很简单哦、、但做题做的有点晕,、麻烦解释一下.谢谢
问题描述：
The child sat in the dentist's chair ,
A tremble
B trembling
C trembled
D to trembled
好像很简单哦、、但做题做的有点晕,、麻烦解释一下.谢谢
答