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Each cluster below contains one topic, one thesis statement, and two supporting sentences. In the space provided, label each item as follows: T—topic TH—thesis statement S—supporting sentence (判断各组里的4句话的功能,如你认为是topic,就写T,如是主旨句,就写TH,如是支持句,就写S) Group 1 _____ a. Films based on historical events are sometimes shown in class. _____ b. Making history more interesting _____ c. Some history teachers use innovative methods to increase student interest. _____ d. Instructors ask students to write short plays dramatizing historical events.