问题
选择题
—I just wonder that made Mark Twain so famous a writer.
—Of course his early experiences.
A．it was what
B．what he did
C．how he did
D．what it was
答案
答案：D
考查强调句的特殊疑问句和语序。从题干的含义看，本题涉及强调句的特殊疑问句和语序。被强调的成分在原句做主语，表示物，用what，疑问句在本题做宾语，用陈述句的语序，因此选D。