单项选择题

(All) fruit contains fiber: an orange provides seven, (a apple five), and a banana four, but (half of) a grapefruit (provides) six grams.

A．All
B．a apple five
C．half of
D．provides
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单项选择题
(While) some pirate ships deprived early American colonists of (many) needed supplies, (others) smuggled in goods, subverted(破坏) British taxes, and (help) in the Revolutionary War.
A．While
B．many
C．others
D．help
单项选择题
In the United States, the number of (deads) due to heart attack and (related) conditions (fell) by 25 percent (between) 1985 and 1990.
A．deads
B．related
C．fell
D．between
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