题目内容

what is a complaint letter? ______

A. 慰问信
B. 推荐信
C. 投诉信

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A complaint letter is used to complain about a______, service or a person to the higher authority.

A. product
B. produce
C. producting

The complaint letter should be concise, clear and ______.

A. fact
B. factual
C. facted

The letter has to clearly mention ______ actually the problem is.

A. what
B. when
C. why

The letter has to describe the problem______a precise manner.

A. on
B. in
C. of