16. You knew that before, ______?
(A) did you
(B) aren't you
(C) isn't it
(D) didn't you

答案：登入後查看
統計： A(164), B(106), C(37), D(1687), E(0) #492051

詳解 (共 2 筆)

#759716

knew:過去式-did　

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#2797842
附加問句，有be v用be，無be用助動...
(共 45 字，隱藏中）
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