LISTENING ACTIVITIES AT PAGES 31 AND 34

PAGE 31

EXERCISE 2

1) photo C

2) photo D

EXERCISE 4

1) B

2) F

3) A

4) D

5) C

EXERCISE 5

1) discoveries

2) experiments, cures

3)  evidence

4) hours

5) research

PAGE 34

EXERCISE 2

1) T

2) F

3) F

4) T

5) T

6) T