单选题
4.
Government reports, examination compositions, legal documents and most business letters are the main situations______formal language is used.
A、
in which
B、
on which
C、
at what
D、
in that
【正确答案】
A
【答案解析】
situation通常与介词in搭配使用,关系代词which代替先行词situation,故A与本题相符。
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