—_____we keep the window _____ all the time?
—No, you don’t have to .
A.Can; opening | B.May; opened |
C.Must; opening | D.Could; to open |
—_____we keep the window _____ all the time?
—No, you don’t have to .
A.Can; opening | B.May; opened |
C.Must; opening | D.Could; to open |