You can’t imagine what great trouble they have _________ the problem_______.
#95579
A
to solve; being talked about
B
solving; discussing
C
to solve; to talk about
D
solving; being discussed
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My uncle has given up _________. He looks very healthy now.
#96316
A
smoke
B
smoked
C
to smoke
D
smoking
It seems you need to apologize quickly ______ a good friend. 
#95570
A
avoiding to lose
B
to avoid losing
C
avoiding losing
D
to avoid to lose