单选题
The government issued a warning to local companies that all waste must be disposed of ______ or they will face heavy fines.
A、
corrects
B、
correcting
C、
correction
D、
correctly
【正确答案】
D
【答案解析】
all waste must be disposed of语法结构完整，横线处应选择修饰be disposed of的副词，故(D)correctly为正确答案。
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