This is an illness that may result in total blindness if         .A．being left u

题型：不详难度：来源：

This is an illness that may result in total blindness if         .

A．being left untreated	B．left untreated
C．not left treating	D．not having left untreated

答案

B

解析

要做好省略结构的题目，考生必须明白省略了哪些成分，学会将句子整合。如本题从句可补全为：if it is left untreated。另外，本题的另一个难点是：学生对untreated的用法搞不明白。老师可将此结构先用主动形表达，即People left the illness untreated.此处untreated作宾语补足语，与illness构成被动关系，转换成被动句为：The illness is left untreated.本句话语意为：如果不治疗，这病可能会造成双目失明。