题目内容
________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.
A. Having explained B. Having been explained
C. Though it was explained D. It was explained
D
练习册系列答案
相关题目
题目内容
________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.
A. Having explained B. Having been explained
C. Though it was explained D. It was explained
D