单选题：— How are you doing all these years, Jim? — Nothing new. E..

One day Chuck is ______ a flight ______ the Pacific Ocean suddenly ______ his plane crashes.[ ] A. in; over; whileB. on; across; whenC. with; through; then D. on; across; as

Mary was on the point of leaving the room ___________the telephone rang.[ ]A. when B. while C. asD. but

Their country has plenty of oil, __________ ours has none.[ ]A. when B. while C. before D. where

I want to buy the jacket,_______ I have not enough money with me.[ ] A. but B. soC. orD. for

—What's going on between you and Peter? —We had a fight. I regarded him as my trustworthy friend_____ to my shock, he gave me away.[ ]A. unlessB. sinceC. ifD. until