18. By the time the doctor arrived, the patient _____ unconscious.
(A) becomes
(B) had become
(C) has become
(D) became

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統計： A(0), B(4), C(2), D(2), E(0) #3992772

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#7474484
第18題 題目翻譯： 當醫生抵達時，病...
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