30. What did Mr. Chang NOT do for his cows?
(A) He fed them with spring water.
(B) He touched and talked to them.
(C) He played music when they ate.
(D) He let them walk freely on the farm.
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統計: A(2), B(9), C(120), D(3), E(0) #2337260
統計: A(2), B(9), C(120), D(3), E(0) #2337260