问题
单项选择题
Most parents encourage their children to take an active part in social events,（）those events do not interfere with their studies.
A.lest
B.though
C.unless
D.provided
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
Most parents encourage their children to take an active part in social events,（）those events do not interfere with their studies.
A.lest
B.though
C.unless
D.provided
参考答案：D