问题
The doorbell is ringing. It _________ Alice , because she__________ Washington.
A:can’t be; has gone to
B:may be; has been to
C:mustn’t be; has gone to
D:can’t be; has left to
B:may be; has been to
C:mustn’t be; has gone to
D:can’t be; has left to
正确答案是：
