Mark was a student at this university from 2006 to 2011，________he studied very hard and was made Chairman of the Students’ Union.

Can you play the guitar — No. I _ ___ . I can play the violin.

Turn off the TV, Jack.___________ your homework now? -Mum, just ten more minutes, please.[ ]

Thank you for giving us a wonderful dinner, Mrs. Wang.—–___________.

He was so _______ after he knew the ________ news.