皮皮学，免费搜题
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搜题
【单选题】
Would you please put the book ___ it belongs?A.
to whom
B.
to which
C.
into which
D.
where
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皮皮学刷刷变学霸
举一反三
【简答题】With the increase in productivity, the cost will be________.
【多选题】Cost productivity rations can be approached from:
A.
cost per lead
B.
cost per lost opportunity
C.
cost per booking
D.
cost per booked room night
【简答题】Factors Affecting the productivity and cost of ground-based systems