1. What is the purpose of the diving suit?
A. To track diver's location
B. To make the diver stay afloat
C. To dive to the bottom of the sea faster
D. To pump air from the surface of the sea

2.the hose and the mouthpiece of the driver are used __________?
A.for breathing
B. for finding direction
C. for lighting the way
D. for communitating

3.the second paragraph informs the reader that __________?
A.water is heavier than air
B. It is essay to float on the water
C. It is exciting to stay under water
D. It is difficult to breathe while diving

4. From the phrases 'a diver suffers from bends,' the reader can guess that bend is ________?
A. a reverse turn
B. an intense pain
C. a wrong direction
D. Aan incorrect information

5. Which statement is true in the selection?
Water pressure ________________
A. is heavier on the sea surface
B. is greater in the deep part of the sea
C. feels more while one is going up the surface
D. is the same on the surface and in the deep part of the sea ​