单项选择题

What is meant by "peer-on-peer" in the second paragraph

A．Acting as equals.
B．Peeking secretively.
C．Looking furtively.
D．Having more and mor
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What is the problem when few realize the link between the ability to talk fast and easily understandable pronunciation and meaning
A．They can actively learn vocabulary items or good syntax.
B．The students have many cognitive problems themselves.
C．It is difficult to talk fast and easily understandably.
D．The need for speed is not clear at the very beginnin
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Some of the scientists assert that there is ______ UFO in the world.
A．no such thing as
B．no such thing as an
C．no such a thing as a
D．no such thing as a
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