Is there something strange high up in the world's {#blank#}1{#/blank#} mountains? If so, is it a big bear? Is it monkey? Or is it a kind of man?

    No one knows. This mystery has puzzled the world for years.

    In 1887, a mountain climber found large footprints in the snow. They looked like the footprints of a very large man. But men don't walk {#blank#}2{#/blank#} shoes in the snow!

    In 1906, another climber saw more than footprints. Far off, he saw a very large animal standing on two legs. As he watched, it ran very {#blank#}3{#/blank#}.

Fifteen years later, newspaper had new stories about the "something". A mountain climber said he had seen the "{#blank#}4{#/blank#}" walk slowly across the snow, far below him. He said it looked like a very large man.

    From then on, more and more people had stories to tell. But not until 1951 did a mountain climber bring back of large footprints. "The pictures showed clearly {#blank#}5{#/blank#} the Snowman walked on two legs." So it was not a bear or a monkey. Could it be an ape man? The mystery grew! And the mystery keeps growing. Some day we may {#blank#}6{#/blank#} what it is that makes the large footprints.

A: Have you ever been to America?

B: Yes.

A: Well, I will go to an American friend's home to celebrate Christmas tomorrow, Could you please tell me what I am {#blank#}1{#/blank#} to do?

B: OK, with pleasure.

A: Should I arrive on time or five to ten minutes late?

B: Both are OK. But don't get there {#blank#}2{#/blank#}.

A: I'm {#blank#}3{#/blank#} that traffic might be terrible.

B: Well, if you're more than fifteen minutes late, it right be a good idea to call the host and tell him or her you're going to be late.

A: OK. Should I {#blank#}4{#/blank#} any flowers?

B: Certainly. Flowers are always welcome.

A: What should I do at dinner?

B: Watch the other {#blank#}5{#/blank#} and do what they do. You'll be OK.

A: I see. Thanks a lot.

B: You're welcome.