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级别：TOEFL Junior
知识点数量：7个
练习题数量：30道
总闪卡数：37张
使用说明：正面为知识点或题目，背面为详细解析和答案。

练习摘录

How long ______ you ______ (be) here?

A、had; beenB、has; beenC、have; beD、have ... been

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参考答案：D

Choose the form that fits the time and the subject of this sentence.

I ______ for you for over an hour

A、waitB、have been waitingC、am waitingD、waited

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参考答案：B

Choose the form that fits the time and the subject of this sentence.

By the time you arrive, I ______ dinner

A、cookB、am cookingC、will cookD、will have cooked

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参考答案：D

Choose the form that fits the time and the subject of this sentence.

She ______ (study) English since she was 5

A、is studiedB、studiedC、has been studying / has studiedD、has studied

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参考答案：C

Choose the form that fits the time and the subject of this sentence.

He ______ in this company for 20 years before he retired

A、had been workingB、had workedC、has workedD、worked

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参考答案：A

Choose the form that fits the time and the subject of this sentence.

By 2030, I ______ here for 30 years

A、will liveB、will have been livingC、will have livedD、live

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参考答案：B

Choose the form that fits the time and the subject of this sentence.

上面是其中 6 道。登录后可以继续练这一库其余约 44 道。