The Olympic Games makes _____ possible for people to live side by side in peace.

----Have you seen Tom and Mary?
----I haven’t seen____ of them.

You should make ______ a rule to leave things______ you can find them easily.

The enemy troop could hardly make any advance, and ________ could they fall back.

— Is this book interesting?
— Yes, but I’m sure it won’t interest         .   

They haven't made          known where they are to hold the conference.  

Some of the wheat is from Canada. What about         ?  

I like such houses with beautiful gardens in front, but I don’t have enough money to buy         .  

There’s another way to survive this competition -- a way no one ever seems to tell you about, _____ you have to learn for yourself.

—There is still a copy of the book in the library．Will you go and borrow _____?
—No．I’d rather buy ______ in the bookstore．