It’s difficult for us __________ the work within two hours.
A. to finish
B. finishing
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__________ is easier than doing.
A. Saying
B. to say
I'm against __________ him to dinner.
A. invite
B. inviting
A person ___________ at the foot of a high mountain will find himself very small.
A. to stand
B. standing
The _________ people rushed into the building.
A. excited
B. exciting