单项选择题

Professor Johnson is said_______some significant advance in his research in the past year.

A．having made
B．making
C．to have made
D．to make
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单项选择题
After having gone ______far, George did not want to turn back.
A．enough
B．much
C．such
D．that
单项选择题
Have you ever received_________of what has happened to her
A．the word
B．words
C．word
D．the words
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