Is there a strange something high up in the world’s tallest mountains? If so, is it a big bear? Is it  a monkey? Or is it a kind of man?
No one knows. This mystery (谜) has puzzled (困惑) the world for years.In 1887, a mountain climber found large footprints (脚印) in the snow. They looked like the footprints of a very large man. But men don’t walk without shoes in the snow!
In 1906, another climber saw more than footprints. Far off (遥远的)saw a very large animal standing on two legs. As he watched, it ran very quickly.
Fifteen years later, newspapers had new stories about the “something”. A mountain climber said he had seen the “snowman” walk slowly across the snow, far below him. He said it looked a very large man.
From then on more and more stories to tell. But not until 1951 did a mountain climber bring back pictures of large footprints. The pictures showed clearly that the Snowman walked on two legs. So it was not a bear or a monkey growing. Someday we may find out just what it is that makes the large footprints.
The passage is about ______________.

A．some mountain climbers	B．some strange animals
C．some large footprints	D．the mystery of snowman

Why were people interested in the footprints.

A．They were footprints of a large bear

B．They looked like the footprints of a large man.

C．They were found in the snow.

D．They were found in the world’s tallest mountains.

The pictures of large footprints were taken by a mountain climber in _________.

A．1887

B．1906

C．1921

D．1951

Why did the mystery grow when a mountain climber brought back pictures of large footprints?

A．They were footprints of an ape man.

B．They were footprints of a snowman.

C．The pictures showed clearly how the Snowman walked.

D．The pictures showed clearly how an ape man walked on two legs.

.Since a mountain climber first found the large footprints in the snow, the mystery of the Snowman has puzzled the world for __________ years.

A．more than one hundred	B．ninety-five
C．eighty	D．fifty