A．childhoodB．chemistC．churchD．chest

A、under

B、behind

C、on

D、in front of

A．childhood exposure to UV

B．sensitivity of the skin

C．unhealthy swimsuits

D．staying up late

A、would abolish slavery in the South

B、would not abolish slavery immediately but to preserve the Union

C、would wage a war against slavery

D、had no idea to abolish slavery in the South.

A、A CO2 cylinder.

B、A hood.

C、Gloves.

D、Boots.

A．became disappointed

B．got angry

C．lost interest

D．could not continue the conversation because he did not know what else he could say

"Mother!" he cried. "A mad dog has bitten my friend Henry, and now they are burning him with red-hot irons. It's terrible!"

"Rabies(狂犬病) ,Louis. Burning the bites is the only hope of stopping Henry from catching the disease."

Henry did get rabies and died, in great pain, some days later. Louis Pasteur never forgot that. "One day," he thought, "I must do something to help people like Henry."

Sixteen years later Pasteur became a Doctor of Science. And he began making important discoveries in his special field.

Pasteur achieved great success in his life. But during the years of research he lost the use of his left arm and leg. Yet he worked on and on, as hard asever, as he was eager to find a way for curing rabies. He never forgot his friend Henry.

After many dangerous experiments on mad dogs, he finally found the answer. Just then a boy who had been badly bitten by a mad dog arrived at his lab. A few days after Pasteur’s treatment the boy got better. He did not catch rabies.

The discovery gave new hope to people in many countries. People sent money to help build the Pastear Institute in Paris. Today it is one of the world’s most famous centres for research.

Pasteur became a Doctor of Science. Doctor of science here means ______.

A．a degree which is the highest in science

B．a person who works in the lab

C．the post in science

D．someone whose job is to make sick people well again

A．The writer did not give his explanation in detail.

B．The rain forests' survival is questionable.

C．It will become warmer and warmer with the depletion of rain forests.

D．Many wild animals and beasts will extinct as result of the depletion of rain forests.

A．This

B．There

C．That

D．It