--who helped betty tidy up the bedroom just now -- --- she cleaned it all by herself
问题描述：
--who helped betty tidy up the bedroom just now -- --- she cleaned it all by herself
a\ somebody
b\ nobody
c\ everybody
d\ anybody
说理由!
答
选择B：nobody
句意是：
刚才谁帮贝蒂整理了房间?
回答：没有人,她自己打扫的.
所以应该是选择：没人,即nobody