单项选择题

Due to mechanical problems, there will be a two-hour ______ to the departure of Flight 309.

(A) delay
(B) pause
(C) cancellation
(D) stopover
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单项选择题
Passengers with over 20 kilograms of luggage will have to pay an ______ fee of $10 per kilogram.
(A) accessible
(B) inevitable
(C) irrational
(D) additional
单项选择题
Industry analysts were surprised by how ______ the economy recovered from recession.
(A) quick
(B) quickly
(C) quicker
(D) quicken
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