We will have a holiday during the Spring Festival. A. 7 day B. 7 days C. 7-day D. 7-days

We will have a _____ holiday during the Spring Festival.

A. 7 day B. 7 days C. 7-day D. 7-days

答案：C

解析：7-day holiday 七天假期

加连字符的n.就不用复数了！

望给好评！