—HowfarisitfromBeijingtoHaikou?—It'sa

问题详情：

—How far is it from Beijing to Haikou?

—It's a______ flight from Beijing to Haikou.

                  A. 3-hour-long              B. 3 hours long              C. 3 hours' long

【回答】

A

知识点：构词法

题型：选择题