________ cold day it is today!

A．What a         B．How a                 C．What

Antarctica（南极洲）is in the in the southern part of the world．It is like nowhere else on the earth．It is much larger than Europe，and nearly twice the size of Australia．The South Pole（南极）is at its center．Antarctica is the coldest and windiest place in the world，even colder and windier than the North Pole．In summer，the sun shines for twenty-four hours a day，but in winter it's completely dark for about three months．Very few plants grow there，but there is some wild life，including whales，seals，and penguins．

When Captain James Cook traveled around Antarctica in the 1770s by ship，be found no one living there．Today，a few scientists work in Antarctica，but they only spend a short time there．

Many scientists are studying the ozone layer，which is getting thinner and thinner worldwide．The biggest "hale" is above Antarctica，and the weather there is getting warmer．Scientists think that this cold and lonely place can teach us a lot about the earth and how to keep the earth safe．

1．When did Captain James Cook travel around Antarctica?

A．In the 1670s．                              B．In the 1760s．

C．In the 1770s．                              D．In the 1780s．

2．What does the underlined part "ozone layer" mean in Chinese?

A．冻土层                B．大气层                C．臭氧层                D．高压层

3．How many kinds of animals are mentioned in the passage?

A．Two．             B．Three               C．Four               D．Five

4．Which of the following is TRUE?

A．Antarctica is nearly twice the size of Australia．

B．Scientists spend a long time in Antarctica．

C．There is no plant growing in Antarctica．

D．In winter，it's dark for about 70 days in Antarctica．

It keeps your insides from falling out. It helps you warm up when you are cold, and it can cool you off when you are hot. It lets you feel things by touch.

What is this? Your skin（皮肤）, of course! What does you skin ask for return for all the wonderful things it does? Just a little care!  So let’s learn how to take care of our skin.

Like the heart and stomach, your skin is an organ （器官）．In fact, it is the largest organ in your body．Unless there's a problem, you may not think about your skin very much．But skin has an important job to do．

Your skin is protecting you．Your skin keeps you from getting sick．When you take care of your skin, you are helping your skin do its job．Taking care of your skin today will help you have no problems in the future．

Clean skin is happy skin! One simple way to take care of your skin is to keep it clean．Keeping your hands clean is very important．When washing your hands, use warm water．Wet your hands, and then use soap．You should wash your hands carefully everywhere．

You'll also want to use warm water, but not too hot, when you take a bath．Use soap to clean your body．Don't forget under your arms and behind your ears! Your face needs attention, too．It's a good idea to wash your face once or twice a day with warm water．

1.We can infer（推断出）from Paragraph 3 that __

2.Which of the following best describes your clean skin?

3.Why does the writer think we should try to take care of our skin today?

4.What does this passage mainly talk about?