难度：★ 考点：连词
1. -Jim, you look so tired!
-Oh, I didn't go to bed ______ it was 12 o'clock last night.
A. until B. as C. if
2. -Bill, please turn down the music, ____Mon ____Dad are sleeping.
-Sony, 1'11 do it right away.
A. neither; nor B. either; or C. both; and
3. Please ell me the truth, ________ I can't decide how to help you next step.
A. so B. or C. but D. for
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