问题
When will the bike-sharing schemes be introduced to the public— Not until a better understanding of them.
A:will we have had
B:have we had
C:we will have had
D:we have had
B:have we had
C:we will have had
D:we have had
正确答案是：
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ongenough to have a job, I would choose to be a doctor,those AIDS patients
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