双休作业（12.7）现在完成时延续性动词专练单项选择1. The bus _ for 20 minutes.A. has left B. had left C. has been away D. had been away2. I _ the League for 5 years so far. A. joined B. have joined C. have been in3. The factory _ since the February of 1988. A . has been open B. has opened C. was open D. opened4. Mary and Rose _friends since they met in 2000. A. have made B. have been C. made D. have become5. My brother _
