21．—Why didn’t he come to the meeting?
—The reason ． this was he forgot
A．about; why B．for; why C．for; that D．about; that
22．—I think smoking is bad for your health． You see the sign “No Smoking” there．
—Yes, I know． But I simply can’t ．
A．give it away B．give it in C．give it out D．give it up
