题目内容
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
解析:
because连接原因状语从句。
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题目内容
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
because连接原因状语从句。
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