单项选择题

A．concerns
B．involves
C．counts
D．means
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单项选择题
A) No, because he is an undergraduate. B) No, because it’s open only to teachers. C) Yes, if he’s a written permission. D. Yes, because he is a postgraduate.
A) No, because he is an undergraduate. B) No, because it’s open only to teachers. C) Yes, if he’s a written permission. D. Yes, because he is a postgraduate.
单项选择题
A．continuedB．keptC．changedD．refreshed
A．continued
B．kept
C．changed
D．refreshed
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