单项选择题
It’s harmful for the students to spend too much of their time（）computer games．
A.playB.to playC.playingD.played
单项选择题 Yesterday I（）in the street when I （）across one of my old classmates.
单项选择题 I（）my driving test at this time last week．
单项选择题 Christopher Reeve said since his life was saved again，he had never thought of（）．
