Jack, your father has gone out without this umbrella!—Well, take it easy. _________ he comes back for it.

I don’t know whether he will come this morning. If he ____, I ____you— Thank you very much.

Hello, this is Jack. Mary I speak to Tom? — Sorry, he isn’t in at the moment. If he back, I’II ask him to call you back.

____ is known to us all is that the World Expo 20

The rain was coming down in buckets. This sentence means ____ .