单项选择题

Only after a heated discussion（）in solving the problem.

A. they did succeed
B. did they succeed
C. had they succeeded
D. they had succeeded

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In recent years, the tourist industry has（）greatly to the development of our country’s economy.

A. contributed
B. supported
C. benefited
D. assisted
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We have（）to the government for a home improvement loan.

A. appointed
B. approached
C. arranged
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