Natural rubber is a kind of .

From the passage we know that ammonium nitrate is a kind of ______.

A．natural gas, which can easily catch fire

B．fertilizer, which can't be stored in a great quantity

C．poisonous substance, which can't be used in overcrowded areas

D．fuel, which is stored in large tanks

Natural rubber is obtained from rubber trees as a white,milky liquid known as latex.This is treated with acid and dried,before dispatched to countries all over the world.

One of the most spectacular qualities of man is notably his ______ to any kind of natural environment.

A．inclination

B．domination

C．adaptability

D．availability

One of the most spectacular qualities of man is notably bis ______ to any kind of natural environment.

A．tendency

B．adoptability

C．adaptability

D．availability

One of the most spectacular qualities of man is notably bis ______ to any kind of natural environment.

A．tendency

B．adoptability

C．adaptability

D．availability

One of the most spectacular qualities of man is notably his ________to any kind of natural environment.

A．inclination

B．domination

C．adaptability

D．availability

听力原文：W: What are you reading now? M: Im looking at this beauty in the picture. Look! Shes really pretty, isnt she? Her skin looks so smooth! W: Well, its just that she puts lots of make-up on her face. Actually, natural beauty comes from within. And you know nowadays the camera work is so artificial. M: Ah, yeah, I can smell jealousy in the air! W: Oh, no. She has nothing that deserves my jealousy. I dont have to put things on my face and I still look pretty. Dont you think so? M: Yeah, right! But what did you put on your face last night, those little greenish things? W: Theyre cucumbers. M: What? I know that cucumber is a kind of vegetable rich in vitamin A. How is it used on the skincare? W: Well, it is a fashion nowadays that women tend to use the natural vegetables on the skincare. And they are much better than any chemical products. M: Really? Then what does the cucumber do for you? W: Theyre natural skin smoothers, natural healers of the skin. Havent you heard that...er... cucumber goes far beyond mere tightening the skin? In fact, cucumbers have been used as a dry skin remedy for centuries, and they are also effective in the treatment of other skin problems. M: I have got a scar on my cheek. Can the cucumber do something about it? W: Try some herbal plants, which have the function of remedying the scarred skin. M: It sounds reasonable. Actually there is much knowledge needed for the skincare. Questions 9 to 12 are based on the conversation you have just heard. 9. What does the woman feel about the beauty in the picture? 10. What do women tend to do nowadays to care for their skins? 11. What is the skincare function of cucumber according to the woman? 12. What does the woman suggest the man do?10．

A．They will eat more cucumbers.

B．They tend to put lots of make-up on face.

C．They tend to try natural vegetable on the skin.

D．They will have some cosmetic surgery on the face.

听力原文：W: What are you reading now?

M: I'm looking at this beauty in the picture. Look! She's really pretty, isn't she? Her skin looks so smooth!

W: (19)Well, it's just that she puts lots of make-up on her face. Actually, natural beauty comes from within. And you know nowadays the camera work is so artificial.

M: Ah, yeah, I can smell jealousy in the air!

W: Oh. no She has nothing that deserves my jealousy. I don't have to put things on my face and I still look pretty. Don't you think so?

M: Yeah. right! But what did you put on your face lust night. those little greenish things?

W: They're cucumbers

M: What? know that cucumber is a kind of vegetable rich in vitamin A. How is it used on the skincare?

W: Well, (20) it is a fashion nowadays that women tend to use the natural vegetables on the skincare, And they are much better than any chemical products.

M: Really? Then what does the cucumber do for you?

W: They're natural skin smoothers, natural healers of the skin. Haven't you heard that... er... (21)Cucumber goes far beyond mere tightening the skin? In fact, cucumbers have been used as a dry skin remedy for centuries, and(21)they are also effective in the treatment of other skin problems.

M: I have got a scar on my cheek. Can the cucumber do something about it?

M: It sounds reasonable. Actually there is much knowledge needed for the skincare.

(23)

A．She appreciates a lot about the skin of the beauty.

B．She shows jealousy about the beauty.

C．She shows satisfaction to the picture.

D．Make-up can turn the ugly to be the beauty.

Why is natural rubber used in automobile tires? Why are synthetic rubbers also used?