難度：★ 考點(diǎn)：連詞
1. A snake bit him ___________ he went to see a doctor at once.
A. if B. where C. because D. so
2.You make lunch, ___________
-I'll take care of the baby.
A. but B. or C. for D. and
3. It isn't warm today, _ the sun is shining.
A. or B. and C. because D. although
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