there are two score of people waiting outside.

问题描述:

there are two score of people waiting outside.

score ,单复数同形,意思是20(人、个)there are two score of people waiting outside——意思是:有20个人在外面等着。

外面有40个人在等

口语:外面有四十号人在候着呢!
书面:有四十个人在外面等候

有四十个人等在外面。
肯定正确