单项选择题

Up to now, the program ()thousands of children who would otherwise have died.

A. would save
B. saves
C. had saved
D. has saved

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()from the top of the tower, the south foot of the mountain is a sea of trees.

A. Seen
B. Seeing
C. Having seen
D. To see
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The settlement is home to nearly 1,000 people, many of () left their village homes for a better life in the city.

A. whom
B. which
C. them
D. those
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