A Collection of TOEFL Reading Comprehension

43. The word "it" in line 25 refers to (A) worksheet (B) problem (C) distinction (D) decision. 44. The word "revise" in line 28 is closest in meaning to (A) ask (B) explain (C) change (D) predict. Questions 45-50. Elizabeth Hazen and Rachel Brown copatented one of the most widely acclaimed. wonder drugs of the post-Second World War years. ................
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