16.________,the accident would not have happened.
A.Properly dealt with B.The problem properly dealt with
C.Properly dealing with D.Properly dealing
意思是：如果妥善处理的话,事故也许就不会发生了
deal with 固定词组,所以D肯定不对
如果不简写的话应该写成
If we properly deal with the problem,the accident would not have happened.
因此B不对
简写后应该用动词现在时,因此A不对
因此选C