A：Excuse me．Will the train to Xi'an come soon？
B：Oh，．（76） ______ ．
A：That's a pity．I missed it．（77） ______ ？
B：It's half past ten．
A：Oh，（78） ______ ．
B：You can take a bus if you can't wait．
A：That's a good idea．（79） ______ ．Because trains will be much safer than buses．
B：（80） ______ ．

A．I agree with you． B．What time is it now？it's good． C．But I would like to take a train instead of taking a bus． D．it left five minutes ago． E．I have to wait here for thirty-five more minutes． F．What shall I do？