A．Nobody can be the best．
B．Do as well as you Can．
C．It’s difficult to do something important．
D．It’s impossible to do something important．
A．He Can help the woman．
B．The machine was just repaired．
C．The clerk doesn’t like to be troubled．
D．The machine is broken．
A．A flight timetable．
B．The way to Union Street．
C．Hiring a taxi．
D．None above．
A．He has lost his ticket．
B．He is expecting a ticket．
C．He went out to buy a ticket．
D．He coHects tickets．