19)I recognized Miss Li at once, for I ______ her several times before.
(A) have seen
(B) had seen
(C) see
(D) should have seen

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統計： A(14), B(49), C(2), D(4), E(0) #1613610

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#4487246
此句考過去完成式的用法。由1. befo...
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