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

Why does the writer think rope skipping also does good to one's eyes

A．Skipping the rope helps make one grow taller.
B．One has to act quickly when skipping the rope.
C．Skipping the rope can make one's eyes more active.
D．One's eyes move when one is skipping the rope.

单项选择题

It is mentioned in the passage that one has to pay tax according to______.

A．how much education one has received
B．whether one is single or married
C．how old one's children are
D．where one lives