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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