問題詳情
124.The airport public announcement system frequently broadcasts updates on flightdelays and cancellations, _____ passengers to check their flight status before headingto the airport.
(A)to be urged
(B) which urging
(C)is urged
(D)urging
參考答案
答案：D
難度：適中0.55
書單：沒有書單，新增