5.He claimed he wrote ______ postcards to his friends that very night.
问题描述：
5.He claimed he wrote ______ postcards to his friends that very night.
5.A.a dozen of B.two dozens of C.three scores of D.two dozen
但是A、B、C都哪里错了?
答
dozen前面接量词时表示有多少个dozen,后面不接of.这是dozen是不可数的,不用加S
dozens of 表示几十的意思.