John does important research _______ the best ways to help the old.
#48571
A
finds
B
finds
C
found
D
to find out
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She spent a lot of time _________the fire that day．
#50622
A
to put out
B
putting out
C
to put on
D
putting on
I’m considering _________ Eiffel Tower on my next day off.
#49821
A
visit
B
visiting
C
to visit
D
visited
______ to forget is a good way to solve our problems and we can also deal with them by ______ of something worse.
#48928
A
Learn; think
B
Learning; think
C
Learning; thinking
D
Learn; thinking