问题
_____ he is the son of’ the boss, he started from the lowest position as a common employee.[ ]
A: Unless
B: Since
C: While
D: As
B: Since
C: While
D: As
正确答案是：
同类题型
I am sorry for having been so rude to you.———That’s OK. I am sure you didn’t___________.
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While the students are_____ the coming exam, the teacher is_____ another exam to test them. [ ]
We grow all our fruit and vegetables, _____ saves money, of course.