50 Tom: Our flight to Barcelona has a long _________ in London. We’ll have to wait for three hours!

Nancy: At least we can explore the airport shops while we wait.
(A)overture
(B)cancellation
(C)departure
(D)layover

湯姆：我們飛往巴塞隆納的航班要在倫敦長時間________。我們得等三個小時！南希：至少我們可以在等待的時候逛機場商店。