Parents should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.
A. because B. through
C. unless D. if
Parents should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.
A. because B. through
C. unless D. if
A
此题考查状语从句中连词的用法。太阳镜可保护眼睛，这是常识，所以不选D项。