单项选择题

Few ballet performers become nearsighted because______.

A．the reason remains to be seen
B．they have special food for themselves as dancers
C．they have special ways to keep slim
D．they dance on their tiptoes

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热门试题

单项选择题

What is the main point the writer is trying to make about the first method

A．One should let one's feet be free.
B．One should protect one's feet to protect one's eyes.
C．One should protect one's eyes to protect one's feet.
D．One should learn to walk barefooted at home.

单项选择题

To cure nearsightedness, people don't usually______.

A．depend on medicine
B．use equipment
C．think of foot exercises
D．pay attention to correcting the way children read and sit