red for danger危险的红色---为什么这里用for?

Although anyone can do it, storm chasing is extremely dangerous. The power of a big storm 31 throw a cow into the air 32 destroy a whole house in seconds. Storm chasers are also often hurt in accidents 33 (cause) by driving in 34 heavy rain. If you are a 35 (begin), it is much safer to join a group for storm-chasing vacations 36____________ the storm season.
However, for storm chasers, it is all worth it . “37 you get 38 (close)to a storm, it is the most 39 (excite) sight you will 40 see in your life,” says Jasper Morley. “Every storm is an example of the power of nature. It is the greatest show on Earth.”

We need to protect animals _______.

A．danger

B．dangerous

C．in danger

D．dangers

________ animals are in danger and there will be ________ space for them if we don’t take any actions.

A．More and more, more and more	B．More and more, less and less
C．Less and less, less and less	D．Less and less, more and more

Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being immediately by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no levels of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be serious. This is the case when only a few cells are hit, and if they are killed immediately. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated（辐射）and feel fine, then die for cancer five, ten, or twenty years later as a result. Or a child can be born weak as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.
小题1:Which of the following statements is true?

A．Nuclear radiation is just like common radio waves.

B．Nuclear radiation can cause cancer to human beings.

C．Nuclear radiation can be detected by human senses.

D．Nuclear radiation can be safe to human beings if its level is low.

小题2:How can nuclear radiation kill an animal?

A．By damaging its heart.	B．By killing a few cells.
C．By hitting any place in its body.	D．By killing many cells in important organs.

小题3: If a human being is hit by nuclear radiation, he may _______.

A．die of cancer after many years	B．die immediately
C．have a child who may be born weak	D．all of the above