Mary decided to for a job at an after-school reading program last year.

On his way to the airport，it ________him all of a sudden that he had forgotten his passport.

Not until all the fish died in the river _____ how serious the problem of water pollution was. [ ]

以下是杜甫《阙题》一诗，请选出排序正确的一项（ ）①未应伤物华 ②留著伴梨花 ③三月雪连夜 ④只缘春欲尽

Nowadays, many people prefer ________ to the countryside ________ the fresh air.