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1. A new system of quality control was brought in to overcome the defects in the firm's products.

A. invested

B. introduced

C. installed

D. insisted

2. The old concerns lose importance and some of them vanish altogether.

A. develop

B. disappear

C. link

D. renew

3. There is always excitement at the Olympic Games when an athlete breaks a previous record of performance.

A. beats

B. matches

C. maintains

D. announces

4. The government is debating the education laws.

A. discussing

B. defeating

C. delaying

D. declining

5. They had a far better yield than any other farm miles away around this year.

A. goods

B. soil

C. climate

D. harvest

答案：BBAAD