----- Nội dung dịch tự động từ ảnh ----- SECTION FOUR: READING COMPREHENSION Part 1. Read the text below and think of the word which best fits each gap. Use only ONE word in each gap. (10pts) Brain training puzzles really can boost intelligence, a study shows for the first time. While previous studies have suggested that number puzzles can improve memory and crosswords can expand vocabulary, scientists (51)................ now proved that mental exercise really does (52)).............. us more quick-witted. A Swiss-American team reports in a leading scientific journal how computer-based mental exercises were used (53)............... improve overall problem-solving ability. (54).................team gave 35 volunteers a series of mental exercises designed to improve their memory. A control group of 35 subjects did not take these tests. Members of the first group were shown a different type (55)....................square every three seconds and asked if a certain square matched (56)...................shown earlier. Participants also heard a series of spoken letters and had to