话题 to what

话题 what 区别

话题 what few

用户 what if

话题 what 的用法

话题 关系代词what

话题 what主语从句

话题 all what

话题 what was

话题 先行词what

话题 which/what?

话题 What though…?

话题 arose what

话题 arise what

问题 What we need...作主语时的主谓一致

比较下面两句：What we need is more time.What we need are doctors.为什么一句用单数，一句用复数？