单项选择题

Does the way you thought of ______ the water clean make any sense

A. making
B. to make
C. how to make
D. having made
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单项选择题
--Where did you have your supper--______.
A. With my uncle
B. At my uncle home
C. At my uncle
D. At my uncle's
单项选择题
The reason ______ they died was lack of medical care.
A. which
B. at which
C. in which
D. why
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