21. Alan: What are you doing tonight?
Kelly: I’m going to the fitness center to exercise.
Alan: ____________________
Kelly: Every now and then.
(A) Do you like to exercise?
(B) Do you often do that?
(C) How do you go to the fitness center?
(D) How do you like to exercise?
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統計: A(2), B(75), C(8), D(4), E(0) #2063884
統計: A(2), B(75), C(8), D(4), E(0) #2063884