39. _____ to be a comfort dog, Mary enjoys people’s hugging and petting.
(A) To be trained
(B) To train
(C) Training
(D) Trained

答案：登入後查看
統計： A(6), B(6), C(28), D(77), E(0) #706199

詳解 (共 1 筆)

#1580584
(A)為了被訓練(B)為了訓練(C)訓練...
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