一、单项选择（共15小题；每小题1分，计15分）
( )1. When Henry arrives at the b us stop, the bus ___ for two hours.
A. has left B. had left C. has been away D. was away
( )2. I ______ the League for five years so far.
A. joined B. have joined C. have been in D. join
( )3. The factory ______ since the February of 1995.
A. has been open B. has opened C. was open D. opened
( )4. Mary and Rose _____ friends since they met in London in 1998.
A. have made B. have been C. made D. have become
( )5. You mustn’t ______ until he comes back.
A. be away B. leave C. be left D. have been
