42. In the sixth paragraph, “Our muscles and bones have developed to expect this force and it is needed to keep them strong and healthy.” What does the word it refer to?
(A) Earth.
(B) Gravity.
(C) A spacesuit.
(D) A spaceship.

38. (A) both… and… (B) either… or… (C) neither… nor… (D) not… but…

39. (A) able (B) unable (C) ability (D) enabling

40. (A) take (B) takes (C) taken (D) taking

41. Osteoporosis refers to the ____________. (A) bone loss (B) slow growth (C) weight problem (D) blood pressure

43. What can be inferred from the passage? (A) The innovation of new spacesuits has made the long mission into the deep space possible. (B) The astronauts should be as static as possible in space to avoid the gradual waste of muscles. (C) Without gravity, the vertebrae will naturally expand slightly, causing a person to become taller. (D) Travel outside of Earth’s protective magnetic shield is irrelevant to the risk of heart disease deaths among the astronauts.

44. According to the passage, which of the following statements is incorrect? (A) The long-term exposure to low-gravity environment might have adverse effects on the body. (B) There has been dramatic breakthrough in technologies that operate in space travel since 1969. (C) A spacesuit is a specially designed garment to keep human alive by keeping a body in a liquid state. (D) After spending months or years in space during long-term space missions, return to Earth can be challenging to astronauts.

45. What is the most appropriate title to the passage? (A) What is an astronaut’s daily life like? (B) Why to develop future space missions? (C) What makes space travels so dangerous? (D) What do we learn from history of space travel?

46. What is the Vietnamese original term for lacquer painting? (A) Hanoi (B) Quoc ngu (C) Song Mai (D) Tran Van Can

47. Which of the following statements about Vietnamese lacquer painting is incorrect? (A) The artist will rub and polish up the images in the painting. (B) The use of lacquer as a medium of art expression flourished in China. (C) Vietnamese lacquer art is extremely time-consuming and labor-intensive work. (D) Lacquer was used to enhance the beauty of household objects in the past in Vietnam.

48. What can be inferred from the passage? (A) The use of pine resin destroys the original flavor of lacquer painting. (B) Lacquer painting signifies national and cultural pride for the Vietnamese. (C) The French colonization had a damaging effect on the conservation of lacquer art. (D) The Vietnamese lacquer painting has its high popularity and fame all over the world.