题目内容：
Johnhe could improve his exam results，but he did not have enough time
参考答案：
答案解析：
单选题：Johnhe could improve his exam results，but he did not have en
- 题目分类：英语
- 题目类型：单选题
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The small child was not old enough to ________ him self.
The small child was not old enough to ________ him self.
---Excuse me．Could you tell me________? ---Yes, There is a v
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将全体正整数排成一个三角形数阵：
将全体正整数排成一个三角形数阵：