题目内容

The most important thing is _________ theory into practice.

A. put
B. to put

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It’s difficult for us __________ the work within two hours.

A. to finish
B. finishing

__________ 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