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【bythetimethecoursewe'velearnedends,we___alotaboutthebackgroundofthecountry.AarelearningBwilllearnCwillhavelearnedDhavelearned】
题目内容：
by the time the course we've learned ends ,we ___ a lot about the background of the country.
A are learning B will learn C willhave learned D have learned优质解答
c 将来完成
A are learning B will learn C willhave learned D have learned
优质解答
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