问题
选择题
Parents should take seriously their children's requests for sunglasses _____ eye protection is necessary in
sunny weather. [ ]
A. because
B. though
C. unless
D. if
答案
答案：A
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Parents should take seriously their children's requests for sunglasses _____ eye protection is necessary in
sunny weather. [ ]
A. because
B. though
C. unless
D. if
答案：A