单项选择题

Achieving a high degree of proficiency in English as a foreign language is not a mysterious ()without scientific basis.

A. process
B. practice
C. procedure
D. program

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单项选择题
In this factory, suggestions often have to wait for months before they are fully ().

A. admitted
B. acknowledged
C. absorbed
D. considered
单项选择题
Californians and New Englanders speak the same language and () by the same federal laws.

A. stand
B. conform
C. abide
D. sustain
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