"They didn’t take measures in time, otherwise the explosions ____．"some experts said．
A．wouldn’t happenB．didn’t happen
C．wouldn’t have happenedD．mustn’t have happened
C
此題考查虛擬語氣。由otherwise引導的含蓄條件句的虛擬語氣，根據(jù)語境是與過去事實相反，其主句的構成為：would/could/might have done,所以選C,句意：一些專家說：“他們沒有及時采取措施，不然的話爆炸就不會發(fā)生了�！�
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