— George, the old washing machine doesn't work! —How come? The repairman just demonstrated（演示）the machine to us and it well.

1. — George, the old washing machine doesn't work!

—How come? The repairman just demonstrated（演示）the machine to us and it well.

A. had been working B. would work C. works D. was working

【考点】

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【答案】

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A. had always been warned B. were always being warned C. are always warning D. always warned

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2. —Catherine, everyone was at the two-hour concert except you.

—Sorry, but I _______ my mother, cleaning up the whole apartment.

A. helped B. was helping C. had helped D. am helping

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A. is raining B. was raining C. has rained D. had rained.

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