“Would you like to come to dinner tonight?”  “I’d love to, ___I’m busy.”      

– Can you come to my birthday party? – I’m sorry, ______ I can’t come.  

“______ did it start?” “About two days ago. ”

Most students watch TV three ____ four times a week.

—Let me help you carry the box.
—No, thanks. It’s big, __________ there is nothing in it.

— _______ do you play computer games?
—Sometimes.

Though English is very difficult to learn, _____ Li Ping _____ Li Lei speak English well．

Mike is good at playing basketball ______Bruce does well in football .

--___________ is your phone number? --It’s 86502566.

Last Sunday, we visited the factory _____ my father ever worked for four years.