21. What is the main purpose of this advertisement?
(A) To promote a new residental community
(B) To introduce a new lifestyle program for residents
(C) To invite people to an open house event in the neighborhood
(D) To highlight the sports and fitness facilities in the area
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統計: A(4), B(0), C(1), D(0), E(0) #3556263
統計: A(4), B(0), C(1), D(0), E(0) #3556263