Questions 53-55 refer to the following l

shuhaiku2019-12-17  6

问题 Questions 53-55 refer to the following letter.Dear Valued customerThank you for taking the time to fill out our questionnaire during your stay with us.  We do appreciate hearing from our customers, as their comments are vital( ) us to continue improving our accommodations.

选项 A.with                 B.for                 C.at                D.as

答案B

解析
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