单项选择题
He worked ______ at his task for weeks before he felt satisfied that the results would justify his long effort.
A．occasionally
B．regularly
C．patiently
D．assiduously
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单项选择题
Alaska's Tongass and Chugach National Forests are America's first and second largest national forests ______.
A．respectfully
B．respectively
C．respectable
D．respectantly
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单项选择题
It would be difficult for one so ______ to be led to believe that all men are equal and that we must disregard race, color, and creed.
A．emotional
B．broadminded
C．tolerant
D．intolerant
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