There are five pairs _______, but I’m at a loss which to choose.
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A
to be chosen
B
to choose from
C
to choose
D
for choosing
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I find the lecture I attended in the Nanjing Normal University yesterday difficult _____. 
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A
understand
B
being understood
C
understood
D
to understand
 Tony lent me the money, ______that I’d do as much for him.
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A
hoping
B
to hope
C
hoped
D
having hoped
Fortunately, what the witness reported to the police on the phone led to ___________.
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A
the suspect's being captured
B
capture the suspect
C
the suspect having captured
D
be captured by the suspect