5. The climbers want to (挑战) themselves in the face of difficulties.

4. It is also very hard to (吸入) air as you get near the top.

3. Even more serious difficulties include (冰冻天气) conditions and heavy storms.

2. Thick clouds (覆盖顶部) and snow can fall very hard.

i.根据句意及汉语提示完成下列句子

1. The Himalayas (绵延) the southwestern part of China.

vt.阅读理解

    Strange things happen when you travel,because the earth is divided into twenty-four zones (时区) . The time difference between two zones is one hour. You can have days with more than twenty-four hours and days with fewer than twenty-four hours. You can have weeks with more than seven days and weeks with fewer than seven days. If you make a five-day trip across the Atlantic Ocean,your ship comes into a different time zone every day. As you come into each zone,the time changes one hour. If you travel west,you set your watch back. If you travel east,you set it ahead. Each day of your trip has either twenty-four or twenty-three hours. If you make a trip by ship across the Pacific Ocean (太 平洋) ，you cross the International Date Line (国 际日期变更线) . This is point where a new day begins. When you cross the line? you change one full day. If you travel east,today becomes yesterday. If you travel west it is tomorrow.

() 1. Something interesting will happen to the time if you travel because .

   A. a day has always fewer than twenty-four hours

   B. a day has always more than twenty-four hours

   C. a day has more or fewer than twenty-four hours

   D. sometimes zones are large and sometimes zones are small

() 2. If we cross the Atlantic Ocean,we

   A. change one full day

   B. set our watch back

   C. set our watch ahead

   D. set our watch back or ahead

() 3. If we travel west across the International

Date Line on July 5th,the date becomes July.

   A. 3rd   B. 4th

   C. 5 th   D. 6th

() 4. The Atlantic Ocean .

   A. is in one time zone

   B. is divided into twenty-four zones

   C. is divided into five time zones

   D. can not be crossed in five days

() 5. Which of the following sentences is TRUE?

   A. If we travel around the world,we will get into trouble in telling the time.

   B. If we travel west across the Atlantic Ocean,we will have twenty-three hours.

   C. If we travel by ship across the Atlantic Ocean,we will cross the International Date Line.

   D. If we travel west across the Pacific .Ocean,today becomes tomorrow.

4. China,one,is, of,oldest,the,countries

3. the,reason,what,main,is

  ?

2. is,older,China,much,country,my, than

v.连词成句

1. made,the,famous,person,that,him,most