________ you have seen he is poor, you should understand why he has to take up two part-time jobs. A...
2022-08-29 04:03:42 50次 2019年天津市高三毕业班联考（一）英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
________ you have seen he is poor, you should understand why he has to take up two part-time jobs.
A. As long as B. Unless
C. Now that D. While
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