Einstein's most important theory is we call the Theory of Re
Einstein's most important theory is we call the Theory of Relativity.
考点:表语从句.此句是一个含有表语从句的复合句,从表语从句的形式上看,主谓宾俱全,但是call需要双宾语即call sth.the Theory of Relativity,what在表语从句中除了具连接词的作用外,还作动词call的宾语.请问这里为什么要添what?