1 Tommy now is ( responsible) ( for ) the Shanghai EXPo in 2010.
2 Have you ( received ) ( Jimmy's ) postcard?
3 He ( heard ) ( from ) his best friend just now.
4 (Because ) ( of ) the teacher has told us how to use the machine,we ( should ) practise more.
5 The waiters are ( busy ) ( serving ) the customers om the restaurant.
6 You don't ( have ) ( to ) hand in your work today,but you (had ) ( better) hand it in tomorrow morning