It took us several hours to make the old man ________ of the safety of travelling by air.

What’s up You lookdown.—I have piles of papers ______, but I typeso slowly.

you didn’t come to the party lastnight— I _____ , but I suddenly remembered I hadhomework to do

I have a tight budget for the trip, so I’m not going to fly _the airlines lower ticket prices.[ ]

Is Dr. Wang ______ today-No, He is busy prearing for an operation.