Mr Wang isn’t here , I think he __________ Shanghai .
--- Must I stay here with you? --- No, you ________. You may go home, but you ________go to the net bar.
Smoking is bad for your health. You should ______________.
We will be away for two weeks because we’ll have a ____________.
---Travelling by plane is _________ than travelling by train. ---Yes, but it is not so ___________ as travelling by train.
Liu Yan is good at math. He always writes __________ in the test.