--who helped betty tidy up the bedroom just now -- --- she cleaned it all by herselfa\ somebodyb\ nobodyc\ everybodyd\ anybody说理由!

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!

B
谁帮他整理房间了
没人,他自己做的

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