Mars is often called “ the red planet” because its rocks are dark red. There are huge windstorms(暴风)on Mars. The Romans gave its name their god of war because of its color.
There are lives on the earth because it is not too hot or too cold and there is air. Is there life on Mars? For many years, people have studied Mars. They have sent instruments(仪器)and robots to the red planet. The first spacecraft, Mariner 4 from America, got a close look at Mars on November. 28, 1964. Mariner 4 showed Mars had a red surface with many big holes. Astronomers thought they also saw straight lines on it. In 2004, the first of US twin rovers (火星探测车). Spirit, found there was water on Mars before.
One day, we will travel to Mars to have an even closer look at the earth s red neighbor.
( )1. What does “the solar system” mean?
A. 银河系 B. 恒星 C. 太阳系
( )2. Why is Mars much colder than the earth?
A. Because there are huge windows.
B. Because it is further from the sun.
C. Because it is full of rocks.
( )3. When did the first spacecraft enter into the space?
A. In 2004 B. In 1964 C. It doesn t say
( )4. How much knowledge (知识)have people learned about the Mars?
A. Enough B. None C. A little
( )5. Which of the following sentences is RIGHT?
A. Mars is the third planet from the Sun.
B. The Romans gave its name their god of love because of its color.
C. The first rover is made by US.
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