单项选择题

Of all the oceans in the world, the Indian Ocean contains more than（）

A．5 per cent of the world’s water
B．15 percent of the world’s water
C．20 percent of the world’s water
D．50 percent of the world’s water

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单项选择题22（）

A．by
B．in
C．at
D．on

单项选择题The number of right-handed monkey is （）the left-handed ones.

A．greater than that of
B．smaller than that of
C．as much as that of
D．equal to that of