[单项选择]______ comes from sheep and some people like eating it.


A. Wool
B. Pork
C. Mutton

[单项选择]______ comes from sheep and some people like eating it.


A. Wool
B. Pork
C. Mutton

[单项选择]______ comes from sheep and some people like eating it.
A. Wool
B. Pork
C. Mutton

[单项选择]

Passage 4
Eating in space is different from eating on earth. The food that astronauts carry with them does not look like the food you eat. Some food is carried in closed bags. It is cooked and frozen before the astronauts get it. All the water is removed from the food. In the spaceship the astronaut puts the water back. He "shoots" hot or cold water into the food bag with a special gun. He eats the food through a small hole in the bag.
Other foods come in bite size. The astronaut puts a whole piece in his mouth at once. There can be no crumbs. Crumbs would float around the spaceship and get in the way. Meat and cake often come in bite-sixed pieces. Astronauts can’ t drink water from open cups. The water would float in drops in the air. The water is put in the special gun. The astronaut shoots the water into his mouth. Eating in space is not easy. Astronauts must learn this way.

The story does not say this, but from what we have read, we
A. you get much hungrier in space than you do on the earth
B. you can't have water to drink in a spaceship
C. astronauts must learn many new and different things
D. you can't eat anything in a spaceship

[单项选择]Some birds like to sit on a sheep because ____________.
A. they can eat its parasites
B. they enjoy travelling with the sheep
C. they depend on the sheep for existence
D. they find the position most comfortable

[单项选择]Some abnormal human behavior may be caused by eating substances that upset delicate chemical balances in the brain.


A. nourish
B. favor
C. prevent
D. disturb