Let’s clean the classroom, ________?

--- Is there a bus to the downtown? -----There ____ be, for it is too late now. You’d better take a taxi.

 The airplane _____late, for we didn’t see the famous pop singer until 10 pm.

(2013·高考天津卷)If he had spent more time practising speaking English before，he________ able to speak it much better now.

--Did Mary come to your birthday party?--No. I __________ her, but she was away on business.