This is an illness that can result in totle blindness if( )A. to leave untreating B. left untreated C.leaving untreating D. is left untreated

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This is an illness that can result in totle blindness if(     )A. to leave untreating  B. left untreated C.leaving untreating D. is left untreated

This is an illness that can result in totle blindness if( )A. to leave untreating B. left untreated C.leaving untreating D. is left untreated
This is an illness that can result in totle blindness if( )
A. to leave untreating B. left untreated C.leaving untreating D. is left untreated

This is an illness that can result in totle blindness if( )A. to leave untreating B. left untreated C.leaving untreating D. is left untreated
B
如果不被治疗,这种疾病将会导致完全失明.

选B

选B