题目内容：
79.
A．when B．unless
C．if
D．whereas
参考答案：
答案解析：
单选题：79.
- 题目分类：英语四级
- 题目类型：单选题
- 查看权限：VIP
B．unless
C．if
D．whereas
B．unless
C．if
D．whereas
13.
13. A．Combine her training with dietin B．Repeat the training every three day C．A
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根据以下资料回答题Which of the following is true according to the pas
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___________ Albert--is a salesman who mainly visits his cust
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