Because of too many differences between the two sides, a lot of questions are still left ________.A in the air B on the air C by the air D through the air
—Jack, could I use your laptop for a while? —___________. Go ahead, please.
I paid a fine of 200yuan for speeding. If only I _________ the traffic rules!
—I did not give offence to you ___________. —Forget it. Let’s make up.
I think he is taking an active part in social work. I agree with you ___________.
It took a long time for the connection between body temperature and illness ___________.