Whoever leaves the room last must ______ that all the lights are turned off.

They had a pleasant chat ________ a cup ofcoffee.

下列各项中加点字活用类型与其他三项不同的一项是（ ）

If we work hard,we will have a to achieve my dream.

stA H1/N1 flu will begin across Britain next week, _____a sharp increase in thedeath cases