______the survivors know more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives ______.
A.Have \/ could have been saved
B.Have \/ could have saved
C.Had \/ could has saved
D.had \/ could have been saved
正确答案：D
如果那些幸存者懂得多一些在冷水中的救生方法那么在1912年泰坦尼克号沉没事件中将会有更多的生命能幸存
