She needs to have a ______ guitar lesson this Friday afternoon.
问题描述：
She needs to have a ______ guitar lesson this Friday afternoon.
She needs to have a ______ guitar
lesson this Friday afternoon.
A.two-hour B.two-hours
C.two-hours’ D.two-hour’s
答
A a two-hour guitar lesson == two hours' guitar lesson === a guitar lesson lasting two hourslike:a 20-minute walk== 20 minutes' walk== a walk of 20 minutes two是复数,后面加hour的复数形式hours...为什么不选D啊two是复数，后面加hour的复数形式hours