题目内容
Read the passage and fill in the blanks with the proper words
English is a very u________ language because so many people use it, not only in England and America but also in other countries of the w________. It is d ________ to say how many people are l________ it. A lot of boys and girls at s________ are w________ hard at it.
答案:useful;world;difficult;learning;school;working
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