1、[單選題]May's ability to learn from observations _____greatly to her success in public life.

• A、belonged
• B、contributed
• C、attached
• D、turned

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2、[單選題]__by a car, the poor man was unconscious for three days.

• A、Hitting
• B、Having hit
• C、Hit
• D、He was hit

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3、[單選題]The harder you work,__progress you will make in the future.

• A、More
• B、the best
• C、the most
• D、the greater

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4、[單選題]Edgar ______?in doing it, though he had failed more than once.

• A、persisted
• B、insisted
• C、assisted
• D、resisted

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5、[單選題]The population of this country ______over 3,000 tons of potatoes every month.

• A、consumes
• B、assumes
• C、resumes
• D、confirms

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