【题目】— Are you ready for the history test tomorrow?
— No, I wish I ______ the clock back.
A.had turned
B.could turn
C.will turn
D.would have turned

【答案】B
【解析】本题考查虚拟语气。wish 后的虚拟语气，如果跟现在相反，用did/were；跟过去相反，用had done；跟将来相反，用would/could/might do； 根据句意，我是希望时间“将来”能退回去，因此选择B could turn。