It was he did frightened me. A. what.that B. that.that C. what.what D. that.what

It was ___he did ___frightened me.

A. what，that                B. that，that                        C. what，what      D. that，what

试题答案

A.

解析：第一空为主语从句的引导词部分，使用what做did的宾语，第二空为强调句型部分，应用that。