题目内容
Fill in the blanks with the given words in their proper forms (用所给单词的适当形式填空,每空格限填一词):
They ______ (visit) the museum three times since it was opened to the public.
答案:have visited
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题目内容
Fill in the blanks with the given words in their proper forms (用所给单词的适当形式填空,每空格限填一词):
They ______ (visit) the museum three times since it was opened to the public.