Mr. Wang is leaving ________ Beijing nextmonth.

She is short．So she sits________ the classroom．

(湖南省雅礼中学2009届高三第七次月考 )—Are you pleased with what he has done?—It couldn’t be ________ . Why didn’t he put more effort into his work?

The boy said ________ couldn’t he work out the problem but his teacher didn’t know how to do it.

Important people don’t have much spare time, as their work all their time.