单项选择题

I regret I haven't given you enough help.

A. saying
B. having said
C. to say
D. to have said
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单项选择题
______ to help was a great encouragement to us.
A. Their coming
B. Them coming
C. They coming
D. They come
单项选择题
Good health enables people to enjoy life and have the ______ to achieve their goals.
A. chance
B. opportunity
C. occasion
D. situation
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