Question

______ he did was quite right.

A. What
B. Which
C. That
D. Who

Answer 1

答案A
考查从句用法。根据句子结构可知what he did 是主语从句，作was quite right的主语，主语从句中缺少he did的宾语，故选择what。Which 也作主语或者宾语，但是前提是要有选择范围。That在名词性从句中不做成分。Who做主语或者宾语，但只能指人。