VI. Select the synonym of the following bold and underlined word in each sentence in the unit.

41. Can you name the first humans to set foot on the moon?

A. step    B. come    C. run    D. go

42. When Gagarin bid goodbye to his family and prepared to leave the planet, there was still enormous uncertainty.

A. the sun    B. the moon    C. the earth    D. the star

43. No one knew precisely what would happen to a human being in space.

A. nicely   B. exactly    C. rigidly    D. roughly

44. How would the body react to the extreme changes in temperature?

A. final    B. ultimate    C. utmost    D. basic

45. As a speed of more than 17,000 miles per hour, the 27-year-old Soviet cosmonaut circled the Earth.

A. pilot    B. driver     C. superman   D. spaceman

46. From the window in space, Gagarin had a view of the Earth no human had before.

A. survey    B. concept    C. purpose    D. vision

47. Gagarin’s flight attracted worldwide attention and made him a hero.

A. concentration     B. devotion    C. publicity   D. recognition

48. The pioneer cosmonaut could have fulfilled his ambition of making a new space flight if the tragic accident had not occurred.

A. ancestor    B. forerunner   C. frontiersman   D. inventor

49. He died in a plane crash on a routine training flight in March 1968.

A. customary   B. compulsive    C. mechanical   D. automatic

50. The successful flight marked the breakthrough of China’s manned space project.

A. victory   B. success    C. development    D. increase