单项选择题

The author advises parents ______.

A．to take medicines before children
B．to avoid taking drags in front of children
C．to throw away old medicines
D．to teach children about medicines
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单项选择题
According to the passage, a linguistic hierarchy of power is ______.
A．a ladder of social status determined by his mastery of a certain language
B．created with the native speaker of a dominant language on the top
C．formed with the non-native speaker of a dominant language in the middle
D．all of the above
单项选择题
What does the author imply with the citation at the beginning
A．It is difficult for a person to learn Standard English.
B．It is easy for a person to speak Standard English.
C．It is not easy for a person to listen to Standard English.
D．The history of Standard English is a process of conquering other languages.
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