通过句型转换和动词形式填空等形式的操练，让学生熟练掌握本堂课的内容。
Let the students do some exercises about this period. Fill in the blanks or change the sentences into differnt forms.
通过句型转换和动词形式填空等形式的操练，让学生熟练掌握本堂课的内容。
Let the students do some exercises about this period. Fill in the blanks or change the sentences into differnt forms.
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