单项选择题

The (development) of (professional) sports in our country (dates) back (to nineteenth) century.（）

A. development
B. professional
C. dates
D. to nineteenth

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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

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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