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
. While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
. In my opinion, you can widen the _____ of these improvements through your active participation.
. The noise was so _____ that only those with excellent hearing were aware of it.
If he refuses to _____ my plan, I can probably find someone more cooperative.
The boy had a _____ escape when he ran across the road in front of the bus.