问题补充:
It’s necessary for you to at least an hour each day to learn the new vocabulary.
A. set off
B. set out
C. set aside
D. set down
答案:
A. set off
B. set out
(答案→)C. set aside
D. set down
解析:句意:你每天留出一个小时的时间来学习生词。set off出发;set out出发,开始;set aside留出;set down 记下。根据句意故选C。