---How old ________ you?---I ______ ten years old.

Not only I but also Jane and Mary ______tried of having one examination after another.

 The fact that so many people still smoke in public places ________ that we may need a nationwide campaign to raise awareness of the risks of smoking.(2011·江苏)

____ can be done ____ been done. 

 The number of students who are fond of English _________ large.