Mother:I'm leaving,dear.Can you look afrer yourself?
Fred:Of course,Mom.Don't worry!How are you going there?
Mother:I think I'm going by bus.If I ____,it will be cheaper.
Fred:But if you ____by taxi,you ____there more quickly.
Mother:You're right.But I think I ____a train.It's neither too dear nor too slow.
Fred:Good idea.
Mother:Are you going out later?
Fred:Perhaps.If I ____,I'll close the window and the door.
Mother:OK.If the phone rings,can you answer it?
Fred:Sue,Mom.
Mother:If you ____,you can have something to eat.I____back this evening____the meeting ends early.
Fred:Yes,Mom.If you ____ go quickly,you'll miss the train.Have a good journey!