36 Eric: Excuse me. Which bus should I take if I want to go to the Orchid Park? Ian: You can take Bus 278. Eric: How often does the bus leave for the park? Ian:______
(A) Early in the morning.
(B) Ten minutes later.
(C) Every twenty minutes.
(D) In half an hour.

（一）在清晨。（B）十分鐘後。（C）每二十分鐘。（D）在一個半小時。