单项选择题 听力原文：M: Is this store open today?W: No, it isn't. It's only open on weekends.Q: When is the store open?(10)A．Everyday.B．Weekends.C．Weekdays.D．Seldom.

单项选择题 听力原文：Can you please tell me the time?(5)A．The time is fast.B．Thank you very much.C．It is too late,D．No, I'm sorry. I don't have a watch.

多项选择题 B-D试验失败的常见原因是：（）