2022年安徽省示范高中皖北协作区第24届高三联考(2022.3)英语试题

21.What is the purpose of some flying taxis companies'carrying out test flights?

A.To compete for a wider market.

B.To get approved for commercial use.

C.To provide an air-taxi service in 2024.

D.To get more serious about their business.