Can you imagine a sea of sand three times bigger than India? This is the Sahara desert(沙漠), the largest desert in the world. In the Sahara,  are very  (1)   different during the day and at night. It is much hotter during the day than at night. The Sahara is very   (2)  . The average(平均的) rainfall in a year is only 70mm. That’s   (3)  one cup of rain in a whole year.

  (4)  the extreme temperatures(气温) in the desert , it is a very difficult place to  (5)  . However, there’s still something you can do to help you stay _  (6)  . Take warm clothes and a blanket. During the day,   (7)   your body, head and face to protect you from the sun and keep   (8)  in your body. A blanket helps you keep warm at night. It can get cold very quickly. The  (9)   in temperature can make you feel even colder.

  (10)   to drink some water at least once every hour. You need your water to  (11)  as long as possible. Drink only what you need.   (12)   you talk, you lose water from your body. Keep your mouth  (13)  and do not talk. You can  (14)  a little, but only to stop you feeling very hungry. You can live three weeks with no food,   (15)   you can only live three days with no water.

It is very important to  (16)   the sun during the day. Make a hole under your car and lie there. This will keep you   (17)  . Find a warm place to  (18)  at night. A small place near a tree or a rock will be the warmest. But be  (19)   before you decide where to sleep. Dangerous animals like snakes   (20)  like to sleep in these places. Look carefully for animals before you lie down.