The doctor did what he could_________ the dying man.
#50563
A
save
B
to save
C
saved
D
saving
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Would you like to go fishing with me? Sorry. I have lots of homework ____
#48389
A
to do
B
do
C
doing
D
Did
At least 300 million people are using QQ_____ by Ma Huateng to chat online.
#51158
A
create
B
created
C
creating
D
creates