China and the United Arab Emirates(UAE) sent    1    (they) first spacecraft to Mars this week. A Chinese spacecraft went into orbit(轨道) around Mars on Wednesday. It followed a UAE's spacecraft that    2    (successful) entered orbit on Tuesday. China's Tianwen-1 spacecraft spent seven months on the trip to Mars    3     traveled nearly 475 million kilometers. Tianwen, the name of    4    ancient poem, means “Quest for Heavenly Truth”. The UAE's spacecraft is called Amal.Amal is the Arabic word for Hope.

The trips to Mars come at a time when both countries have made quick progress in space programs.China's space program brought moon rocks back to Earth in December.That is the first time that a spacecraft    5    (return) to Earth with moon rocks since the 1970s.China was also the first country to manage    6    (land) a spacecraft on the little-explored far side of the moon in 2019.

China's spacecraft will send a vehicle, called a rover, to land on the Marian surface. The goal is to search for    7    (sign) of life in the area named Utopia Planitia,    8    the U.S. Viking 2 lander landed in 1976. Along with Tianwen-1, Amal will join six other spacecraft already    9    (operate) around Mars. Among them, three    10    (be) from the United States.