47. Which of the following statements is TRUE?
(A) Solar Impulse 2 is going to achieve its goal of flying around the earth.
(B) The pilots are allowed to sleep for short durations while sitting in the passenger seat.
(C) Solar Impulse 2 is meant to promote the use of solar power.
(D) The two pilots have to deal with all the problems they encounter without any help.

43. Which of the following statements about ukiyo-e is TRUE? (A) The merchants in the Edo period helped to bring about the popularity and success of ukiyo-e. (B) The Fifty-three Stations of the Tōkaidō by Moronobu were master works from the 19th century. (C) Each print of ukiyo-e required the collaboration of three experts: the designer, the engraver, and the publisher. (D) Hokusai and Hiroshique were early artists in monochromatic prints.

44. What is not mentioned in the article? (A) The history of ukiyo-e. (B) Why ukiyo-e became popular. (C) Great works and artists of ukiyo-e. (D) The influences of Western art on ukiyo-e.

45. What does the word “flimsy” in the third paragraph mean? (A) light and strong (B) weak, thin, and fragile (C) worn and tattered (D) fashionable and eye-catching

46. Which of the following statements about Solar Impulse 2 is TRUE? (A) The batteries that store the power take up most of its weight. (B) It is larger than a Boeing 747. (C) Because of its weight, it flies relatively fast. (D) The cockpit contains everything its pilots need while they are in the air.

48. The article is mainly about _____. (A) the relationships between antibiotics and infants’ gut microbiomes (B) suggestions on the use of antibiotics in treating ear infections (C) the investigation of the natural trajectory of microbiome in kids with the use of antibiotics (D) the impact antibiotics have on infants’ gut microbiomes

49. Which of the following statements about the human microbiome is NOT TRUE? (A) The gut microbiome is vital to a person’s health. (B) The human microbiome is dynamic throughout a person’s life. (C) The use of antibiotics may influence the makeup of the microbiome. (D) It is roughly at the age of three that the composition of a person’s microbiome is set.

50. According to the passage, which of the following is TRUE? (A) The infants who received antibiotics had more beneficial bacteria in their bodies. (B) A less diverse microbiome indicates an unexpected discovery. (C) The use of antibiotics may help produce more antibiotic resistance genes. (D) The robustness of children’s gut microbes is the main concern of the researchers.

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