An old scientist recently made several tests with different animals to find out which was cleverer than other animals.
In one test the old scientist put a monkey in a room where there were several boxes. Some boxes were inside other boxes. One small box had some food in it. The scientist wanted to watch the monkey and to find out how long it would take the monkey to find the food. The scientist left the room. He waited a few minutes outside the door. Then he got down on his knees and put his eyes to the keyhole(锁孔). What did he see? To his surprise, he found himself looking into the eye of the monkey. The monkey was on the other side of the door and looked at the scientist through the keyhole.
The scientist did the test to see ____________.

A．if the monkey would steal (偷) the food

B．if the monkey would look for the food

C．if the monkey was cleverer than other animals

D．if some boxes were inside other boxes

In one test the scientist put a monkey __________.

A．into a small box

B．into several small boxes

C．into a box where there was some food

D．in a room

After the scientist left the room, the monkey_________.

A．began to eat food

B．began to look for food

C．looked at the scientist through the keyhole

D．came into the boxes one after another

The scientist_______________.

A．got down on his knees and waited outside the door

B．got down on his knees and heard with his ears

C．left the room for a long time

D．looked at the monkey through the keyhole with his eyes

To the scientist’s surprise ______________.

A．the monkey got down on its knees

B．the monkey came out of the room

C．the monkey looked at the scientist through the window

D．the monkey put its eye to the keyhole