As we know, the desert covers large areas of the Earth. In the desert, there is very little rain and it is very hot in the day and so cold at night. If you are a hiker (徒步者) or drive through the desert, it might be wise to know what you should do in order to be saved in the desert.

Drink a little water every hour. If you find a small piece of land where the earth is wet, dig deep to look for water. Another method of getting water is to cover a green plant with a plastic bag. As it breathes, the water vapor (蒸汽) will be collected inside the bag. Little by little, you can collect enough water to drink.

Plan to travel at night and sleep during the day, if you find you have to stay in the desert for a period of time. If you can find any shade (阴凉处) in the desert, use it to protect you from the strong sunlight.

Wear clothing in light color. It may seem like you’ll be cooler if you wear that kind of clothes, which actually helps your body to become cool and helps protect you from sunburn.

Prepare to signal (发信号) planes passing overhead if you are caught in the desert. During the day keep a smoky (有烟的) fire burning and at night, a bright, clean burning one. Spell out the word SOS on the ground as large as you can using whatever materials you can find. In this way, you have more chances to be saved.

根据短文内容，判断句子正（T）、误（F）。
【小题1】The desert is very hot all the time.
【小题2】Drink enough water before you start to travel in the desert.
【小题3】It is a good way to travel at night and sleep in the daytime in the desert.
【小题4】Spell out SOS on the ground so that planes passing overhead can find you easily.
【小题5】The last paragraph tells us how to signal for help if you are caught in the desert.