45
(A) so
(B) if
(C) as
(D) when

41 (A) had (B) have had (C) should have (D) should have had

42 (A) laboring (B) learning (C) labored (D) learned

43 (A) because of (B) according to (C) such as (D) owing to

44 (A) forced (B) forcing (C) turned (D) turning

46 What is the main purpose of this passage? (A) To compare two famous Chinese railroads. (B) To explain a health hazard at high altitudes. (C) To detail the process of constructing a railroad. (D) To persuade travelers to take a train trip to Tibet.

47 Which of the following statements about the Qinghai-Tibet Railroad is NOT true according to this passage? (A) It runs across high altitudes. (B) It connects Lhasa with Qinghai. (C) It causes the permafrost to melt. (D) It marks an amazing engineering victory.

48 What does the word "permafrost" in the second paragraph most likely mean? (A) A hard shiny metal that exists in the ground. (B) A layer of soil and rock that stays icy forever. (C) A place where water from a river falls down over a cliff. (D) A straight surface that has one side higher than the other.

49 Which of the following is one of the challenges engineers and workers had to face during the construction of the Qinghai-Tibet Railroad? (A) Travelers from Beijing may suffer altitude sickness in Lhasa. (B) The idea of a train trip is not as appealing as that of air travel. (C) The tourism industry is impossible on the snow-covered permafrost. (D) The railroad track may become bent or curved if frozen ground melts.

50 Which of the following statements can be inferred from this passage? (A) The Qinghai-Tibet Railroad is a record holder in terms of the total length of its track. (B) The completion of the Qinghai-Tibet Railroad is likely to enhance Tibet's tourism industry. (C) Thousands of engineers died of altitude sickness while building the Qinghai-Tibet Railroad. (D) The permafrost under the Qinghai-Tibet Railroad makes it necessary to breathe bottled oxygen.

16. Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm = (A) 269.01860 cm (B) 269.0186 cm (C) 269.019 cm (D) 269.02 cm (E) 269.0 cm