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— I tried       it out in this way, but I failed.— Why not       it in some other ways?
#50281
A
to work; try doing
B
to work; try to do
C
working; try to do
D
to work; to try doing
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Mr. Wu came into the  classroom ,         a book in his hand.
#49562
A
hold
B
holds
C
holding
D
held
Jim spent  half an hour ______his work.
#50083
A
finish
B
to finish doing
C
finishing to do
D
finishing
Sir, would you mind not _____ here, please?
#49378
A
to smoke
B
smoke
C
smoking
D
smoked
What can we students do _____ the environment?
#50177
A
to protect
B
protected
C
protecting
D
protects
 - I sometimes don't have enough time _______ with my parents. - You should spend more time _______ with them at home.
#48862
A
to chat; to stay
B
to chat; staying
C
chatting; to stay
D
chatting; staying