— Do you still remember when we went to Chongqing?
—I can’t remember now but ______ sometime last summer?
A. could it be B. might it be C. could it have been D. might it have been
— Do you still remember when we went to Chongqing?
—I can’t remember now but ______ sometime last summer?
A. could it be B. might it be C. could it have been D. might it have been
C
could have done对过去的动作可能性的判断。