Question

--When are you free, Lucy?-________ today ________ tomorrow is OK.

--I'm free every day.

1. A.
   Both, and
2. B.
   Neither, nor
3. C.
   Either, or
4. D.
   Not, and

Answer 1

C
因为天天有空，所以用either…or连接两个并列主语，便用就近原则来判断，谓语动词为单数与靠近它的主语tomorrow一致。