My friend has returned from the UK. She ______ at Oxford for four years, during which we communicated with each other on the Internet.
#102633
A
studied
B
has studied
C
had studied
D
has been studying
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 If I ____ more about diamond, I ____ cheated by that man.
#102987
A
had known, would not be
B
had known; wouldn’t have been
C
knew; would not have been
D
had known; would never be