题目内容
Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases.
A. not handled
B. not being handled
C. not to be handled
D. not having been handled
练习册系列答案
相关题目
题目内容
Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases.
A. not handled
B. not being handled
C. not to be handled
D. not having been handled