---Do you have Mary's phone number?---Sorry,_____ (2011重庆)A.I don't know B.forget it C.here you are D.I can't remember it为什么不能选A?

问题描述:

---Do you have Mary's phone number?---Sorry,_____ (2011重庆)
A.I don't know B.forget it C.here you are D.I can't remember it
为什么不能选A?