My friends isn't in her office. She's . A.on a holiday B.on holiday C.in holiday D.in holiays
问题描述：
My friends isn't in her office. She's . A.on a holiday B.on holiday C.in holiday D.in holiays
答
My friends isn't in her office.She's .A.on a holiday B.on holiday C.in holiday D.in holiays
度假 “on holiday” "on vocation" 固定词组 选B