(2013·南京二模)Under the environment of fierce competition, the only way John could imagine ________ stress was to get tougher by making greater efforts.

He is said ______ in the supermarket when he was doing shopping yesterday.

The patent officer ______ with my file explained to me that a plant variety is not a/an _______ invention as it is a result of adjusting growth scientifically.

Anyone ________ bags, boxes, or whatever, was stopped by the police in Egypt.

Many things _____ impossible in the past are common today.