Concept cars are a way for designers to their ideas on the public with complete freedom.A.

问题补充：

Concept cars are a way for designers to their ideas on the public with complete freedom.

A. try on

B. try for

C. try over

D. try out

答案：

A. try on

B. try for

C. try over

(答案→)D. try out

解析：本题考查动词短语辨析。句意：概念车是设计师自由尝试他们的想法一种方式。try out试验；考验。