题目内容：

语法填空(在空白处填入1个适当的单词或括号内单词的正确形式)

China's space program has become the first 1. (land) a spacecraft on the so-called dark side of the moon.  The landing made the country closer to the goal of becoming 2. space power. The moon’s far side is not     always dark. But it is often called the dark side 3. it faces away from Earth and little is know about it. One 4. (difficult) of operating on the far side of the moon is communicating with Earth. Last May. China launched  a satellite so that Chang’e 4 could send back information.Chang'e 4 has sent a picture back to Earth 5. shows a  small crater(环形山)and an empty surface that appears to be lit 6. a light from the lunar explorer.

The landing  is  an example  of China’s 7. (grow)ability to compete  with the  American, Russian  and  European space programs. China also wants to 8. (strength) its position in lunar exploration. The United State   is the only country that has 9. (success)sent a person to the moon. Now, China is considering a crewed( 载 人的) mission, as well. And, China plans to send a Chang'e 5 spacecraft to the moon next year and have 10. return to Earth with collected particles(微粒).