You had better_________because you have to drive back home.

I used to go camping a lot, so it isn’t the first time I ____in a tent.

 There are a few books on the shelf. But only one of them is________. 

He was admitted to a famous university，________ was obvious that his situation had gone beyond his parents’ expectations.

Teterboro is the same airport where a plane took off earlier this morning before colliding (碰撞)with a sightseeing helicopter over the Hudson River.