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
解析
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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
解析