If we __________ the window yesterday, it __________ so cold in here.
A. had closed / would not have been
B. closed / were not
C. have closed / had not been
D. closed / had not been
Chọn đáp án A
If you ____________ down the volume of your stereo, the neighbours would not have complained.
If they __________ a new tent, they__________ wet during the night.
If the men __________ the batteries, they 999 enough power for their laptops.