单项选择题

Any customers not ______ content with our services are entitled to a full refund or an instant replacement

(A) completed
(B) completion
(C) complete
(D) completely
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单项选择题
______ checks for maintenance are performed regularly, you are not assured of reliable, quality service.
(A) whereas
(B) in case
(C) as long as
(D) unless
单项选择题
It is my deepest regret that our hotel cannot be responsible for any personal belongings left ______ even within the hotel properties.
(A) responsive
(B) unattended
(C) responsible
(D) careless
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