But for the fact that the firefighters _____ at the spot in time, more people ______ their lives in the fire.
A．a(chǎn)rrived; diedB．had arrived; would lose
C．a(chǎn)rrived; would have lostD．has arrived; could have lost
C
第一空敘述過去的事實用一般過去時態(tài)；第二空考查虛擬語氣，與過去的事實相反主句用：情態(tài)動詞+have done。 句意：要不是消防員及時到達火場更多的人會在火災中失去生命。
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