单选题
(Breaking) up water (into) hydrogen and oxygen is a good example of (as) is known as (a chemical change).
A、
Breaking
B、
into
C、
as
D、
a chemical change
【正确答案】
C
【答案解析】
as改为what。画线处应的是介词of的宾语，is的主语。as不符合，应该用what。
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