淮南师范学院乘车优惠卡每次充磁可划卡次数为（）次。
A.一
B.二
C.三
D.四
参考答案：D
That was the first time I _____ there and I was impressed by the friendly people very much. [ ]
A. go
B. was going
C. had gone
D. have gone
I have no idea _______ they will pass the final exam.
A．that
B．when
C．why
D．whether
