Unit Ten By the time I got outside , the bus had already left .
一、单项选择:从A、B、C三个选项中选择最佳答案填空。(15 分) ( )1. - Jim ,why didn’t you go to Beijing by train ? - Bad luck ! When I got to the station , the train ________. A left B had already left C has already left ( ) 2 -What did you see , Susan? – Oh, I saw many people ________ trees on the hill . A to plant B planting C planted