单项选择题

The author was ______ when he tried to protect the deaf kid against the two bullies.

A．about ten years old
B．not quite about ten
C．in his late teens
D．in his twenties
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单项选择题
According to the passage, distance learning is considered to ______.
A．completely change the way people acquire knowledge.
B．be of little value for people's acquisition of knowledge.
C．be useful in some aspects for the acquisition of knowledge.
D．have great potential in guiding people to acquire knowledge.
单项选择题
Employees are unwilling to share knowledge with others because ______.
A．they are afraid to be blamed by their boss.
B．they, are afraid to be outdone by their colleagues.
C．they consider it a waste of time to do it.
D．they want to spend time, acquiring more knowledge.
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