It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of ...
2022-10-11 05:09:05 35次 2016届高考试卷分项版解析专题06英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
A．may B．couldn't
C．should D．needn't
本题链接：
