Last night Bruce was observed________the building with two young men and take a taxi away

Is it interesting to play computer games—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.

Mr. Smith came to our school in 2003. He _____ here for 10 years.

Don’t use my handkerchief to wipe the table，gentleman.—Oh, I’ m very sorry.I________clearly

What’s that –_____is a jacket.