By the time he retires, Professor Baker for almost forty years. A. will teach B. has taught——青夏教育精英家教网—

摘要：By the time he retires, Professor Baker for almost forty years. A. will teach B. has taught C. will have taught D. will be teaching

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By the time he retires, Professor Baker ____ for almost forty years.

A. will teach B. has taughtC. will have taught D. will be teaching

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