18. The safety helmet saved the worker; otherwise, he    by a flying object. . 

A.    would be killed

B.    would have been killed

C.    was killed

D.    had been killed

 

18.   B考查虛擬語氣。句意：安全帽救了工人（的命），否則，他就被飛來的物體砸死了。這里的otherwise相當(dāng)于一個(gè)虛擬條件句：If it had not been for the safety helmet.主句是對過去事實(shí)相反的虛擬，故用would have done。所以選B。

題目來源：2015全品語法快練高中英語新課標(biāo) > 訓(xùn)練24 情態(tài)動詞和虛擬語氣

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