Question

[DatJumpIntoTheHole]

IV. Fill ONE suitable word into each numbered blank. Write your answers in ‘Your answers’ part.

Puzzles can increase intelligence

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 (1)­­_______ now proved that mental exercise really does (2)

 ­­_______ us more quick-witted. A Swiss-American team reports in a leading scientific journal

how computer-based mental exercises were used (3) ­­______improve          overall problem-solving

ability.

(4) ­­_______ 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 (5) ­­_______ square every three seconds and asked if a certain square matched (6) ­­_______ shown earlier. Participants also heard a series of spoken letters and had to decide (7) ­­_______ each was the same as one presented two or three steps earlier in the sequence. If they did well, the task became harder and if they did badly, (8) ­­_______became easier. They repeated the exercises for between eight (9) ­­_______  nineteen   days.

Their problem-solving ability was then compared with the group who (10) __________ not done the exercises.

The results of the studies, published in The Proceedings of the National Academy of Sciences, showed that the group who took part (11) ­­_______ the brain training exercises had a significantly better problem-solving ability than the other group. Moreover, the more the participants trained, the more problems (12) _____________ could solve.

Your answers:

1.	2.	3.	4.	5.	6.
7.	8.	9.	10.	11.	12.

Answer 1

[Đỗ Thanh Hải]

1 have

2 take

3 to

4 The

5 of

6 one

7 if

8 it

9 and

10 had

11 in

12 they