You must______your cigarette when you areat the gas station.

The policeman havefined me for speeding but finally，he let me go

You’ve been working all morning-you ________ a rest.[ ]

You seem familiar with Mr. John?—Sure, we ______ together for three years in the 1990s.

________ do so many students stand before the blackboard— To find out some information on the New Year Show.