What happens to nitrogen in body tissues if a diver ascends too quickly
A. It forms bubbles.
B. It goes directly to the brain.
C. It is reabsorbed by the lungs.
D. It has a narcotic effect.
じょうずじゃなくても （ ）で いいです。
A. だめ
B. へた
C. うそ
D. やすもの
What does the passage mainly discuss
A. The equipment divers use.
B. The effects of pressure on gases in the human body.
C. How to prepare for a deep dive.
D. The symptoms of nitrogen bubbles in the bloodstream.
According to the passage, early-twentieth-century education reformers believed that ______.
A. different groups needed different kinds of education
B. special programs Should be set up in frontier communities to modernize them
C. corporations and other organizations damaged educational progress
D. more women should be involved in education and industry
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