4. Different airlines have different _____ for carry-on luggage, but many international airlines limit acarry-on piece to 7 kilograms.
(A) landmarks
(B) restrictions
(C) percentages
(D) circumstances

參考答案

答案:B
難度:困難0.333333
統計:A(2),B(1),C(0),D(0),E(0)

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