A. depending
B. creating
C. interesting
D. carrying
A. but
B. because
C. as
D. as soon as
A. of
B. on
C. with
D. about
A. Over
B. Of
C. During
D. While
A. area
B. sight
C. part
D. place
A. strong
B. strongly
C. strength
D. strengthen
A. was become
B. has become
C. is become
D. is becoming
A. competition
B. examination
C. test
D. round
A. work
B. history
C. period
D. race
A. doing it in tropical seas
B. explaining the technique to a beginner
C. describing how exciting it can be
D. doing it for the first time
A. take a deep breath
B. take two deep breaths
C. take repeated deep breaths
D. take much physical exercise
A. You will not be able to dive deeply enough.
B. You will not be able to float properly.
C. You will use up too much oxygen.
D. You will lose consciousness.
A. to protect their feet cut from sharp rocks
B. to protect them from the rays of the sun
C. in order not to become infected
D. in order not to lack oxygen
A. it is extremely dangerous
B. many people who do it suffer from oxygen shortage
C. you have to buy special clothes in order to do it
D. most swimmers can learn to do it
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