------Mum,can I go out to play with Tom for just a while ? ------ _______ and do what you like.
________ we have enough evidence,we can't win the case.
He is so busy.He cannot afford enough time with his son________he wants to.
I have heard a lot of good things about you ________ I came back from abroad.
________I have to give a speech,I get extremely nervous before I start.
Mark needs to learn Chinese________his company is opening a branch in Beijing.