To help the sick people in the hospital is _____ for me .
There ____ a set of keys in the Lost and Found case.
______ father is a doctor.
I often do homework after dinner, but my brother _______.
--Does Lisa have a red schoolbag?--No, but she has ____ orange one.
This book is bad. It is ______interesting ______exciting. A. either…or B. both…and C. neither…nor