21. My neighbors are Mr. and Mrs. Brown. I _____ them ever since I was a child.
(A) knew
(B) have known
(C) know
(D) had known

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統計： A(3), B(68), C(0), D(14), E(0) #598274

詳解 (共 1 筆)

#4642882
since 自從過去到現在，所以動詞要用...
(共 36 字，隱藏中）
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