单项选择题

Non-fat dairy products supply the needed nutrients without ______ calories.

A. excessive
B. optional
C. additional
D. arbitrary
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单项选择题
The Group of Seven major industrial countries concluded its annual ______ meeting today.
A. summit
B. peak
C. height
D. highlight
单项选择题
Although our boss had been so unkind to us, we heaped coals of fire on his（）by helping him in his misfortune.

A. shoulder
B. hand
C. arm
D. head
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