After Jack had sent some e-mails, he______ working on his project. (2012 .山东)
They looked at each other, ______.
Mr. Smith, _______ of the ______ speech, started to read a novel.
Look, what a dirty classroom we have got! It really wants ______.
It is high time, I think, that you got down to ______ something in class.
I've never seen a Shakespeare's play ______ so wonderfully.