Jim______   sing Chinese songs very well now, but he______do it last year.

I __________use a clock to wake me up because at six o'clock each morning the train comes by my house. 

— Is there an express to Beijing tonight? — There ______ be, but you’d better call the booking office to make sure. 

I am feeling sick now．I ________ so much chocolate．

 I’m as busy as a bee; ________ you bother me with so many questions now?