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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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

单项选择题

It is sometimes difficult （） you have just met.

A．to make pleasant conversation among people
B．making pleasant conversation to people
C．making pleasant conversation for people
D．to make pleasant conversation with people