问题

She studies hard all the time; she never gives up .
A:has she; Yes, she has
B:hasn’t she; No, she hasn’t
C:is she; Yes, she is
D:isn’t she; No, she isn’t;
B:hasn’t she; No, she hasn’t
C:is she; Yes, she is
D:isn’t she; No, she isn’t;
正确答案是: