单项选择题
A.for B.on C.to D.with
—— Mary, thanks very much for your help. —— (). Have a...
—— Mary, thanks very much for your help. —— (). Have a good day.
A.It’s OK B.It’s my pleasure C.Nothing particular D.No problem
Theownerofthestore()hisfloorwhenIwalkedin.A.is sweeping...
单项选择题The owner of the store () his floor when I walked in.
A.is sweeping B.sweeps C.was sweeping D.swept