问题
选择题
6．What ______ great progress you have achieved in such ____ short time!
A．a ; a
B．/ ; a
C．/ ; /
D．a; the
答案
答案：B
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6．What ______ great progress you have achieved in such ____ short time!
A．a ; a
B．/ ; a
C．/ ; /
D．a; the
答案：B