题目内容：
7. _____ scores of times ,but he still couldn’t understand it .(本题2.0分)A、 A Having explained
B、 B Having been explained
C、 C Though it was explained
D、 D It was explained
参考答案：
选择题：7. _____ scores of times ,but he still couldn’t un
- 题目分类：东北林业大学-大学英语3
- 题目类型：选择题
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A、 A Having explained
B、 B Having been explained
C、 C Though it was explained
D、 D It was explained