单项选择题

A．Mostly English.
B．Japanese.
C．Chinese.
D．Each language about half the tim
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单项选择题
A．Wearing arm weights while you are swimming.B．Jogging vigorously in one place for a long time.C．Using bicycles that require you to use both your arms and legs.D．Walking slowly while swinging your arms back and fort
A．Wearing arm weights while you are swimming.
B．Jogging vigorously in one place for a long time.
C．Using bicycles that require you to use both your arms and legs.
D．Walking slowly while swinging your arms back and fort
单项选择题
If man continues to interfere with the balance of nature, it is possible that ______ may soon become extinct.
A．man
B．all the living things
C．some plants
D．some birds and animals
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