Last summer i took a course on how to make dresses.详细分析一下句子成

Last summer i took a course on how to make dresses.详细分析一下句子成 Last summer I took a course on _.A.how to make dress B.how d 9 . Last summer I took a course on ____ . 　　A . how to make Last summer I took a course on how to make ties. Last summer I took a course on _______.A how to Last summer I took a course on( )poisonous gases 9 .Last summer I took a course on ____ . Last summer I took a course on ________. Last summer took a course on_______ Last summer I took a subject on_________. Last summer,my parents and I took a trip to Wutai Mountain.I I went to Beijing____my last summer holidays.a.about b.on c.