Question

—What will your parents do?
—They will go on a ______ visit to Beijing.   
A. seven day        B. seven-day        C. seven-days

Answer 1

B

試題分析： a seven-day visit一個(gè)七天的訪問。有連字符時(shí)不能用復(fù)數(shù)形式。句意：你的父母將去做什么？他們將去北京參觀七天。故選B。