14. You should ________ your supervisor right away when an accident happens.
(A) be calling
(B) call
(C) have called
(D) to call
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統計: A(106), B(739), C(164), D(58), E(0) #695000
統計: A(106), B(739), C(164), D(58), E(0) #695000
詳解 (共 3 筆)
#5557344
助動詞後面要+ 原型動詞V
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