12.Our professor             the law: Any one who is late for class must write an apology letter.
(A)lay down
(B)laid down
(C)lay back
(D)laid aside

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統計： A(6), B(14), C(1), D(2), E(0) #2322852

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#7261917
這組單字測驗的核心在於動詞三態的變化（...
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