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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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 The workers were made ______ twelve hours a day.
#49956
A
work
B
to work
C
worked
D
working
Do you have any trouble           the foreigners?
#51023
A
to understand
B
understanding
C
understand
D
understood[
Parents find it difficult ________ with their children.
#48462
A
talk
B
talked
C
talking
D
to talk
I’ll do everything I can _______ you out.
#48648
A
helping
B
help
C
helped
D
to help
She is ________ in English.
#50840
A
interested
B
interesting
C
interests
D
interest