--- Do you think we can get to the airport in time? --- Yes, so long as we           held up in any traffic jam?

A poet and artist _____ coming to speak to us about Chinese literature and painting tomorrow afternoon. 

Nowadays, cellphones have features such as games ,music and calendars and more new functions___.

--- It’s said that another new car factory _______ now. --- Yeah.  It ________ one and a half years.    

The changes of the plants and animals in an area ________ from differences in climate and the           nature of the country.