--Flight 302 to London_______ until 7:30 tomorrow morning.--No wonder I hear so many plaints from the passengers.A.has been delayedB.delayC.delayedD.will be delayed
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A解析确定首句时态的关键信息在于----No wonder I hear so many plaints from the passengers.既然听到了乘客的抱怨，说明航班已经被推迟。也就是说，推迟这一动作发生在过去且已对现在产生影响，所以用现在完成时。