问题
选择题
He kept smiling secretly and we were all wondering that made him so happy.
A．how it did
B．what he did
C．how it was
D．what it was
答案
答案：D
本题考查强调句。本题考查强调句的特殊疑问句形式。宾语从句中缺少主语，故用what。根据句意选择D。
搜题请搜索小程序“爱下问搜题”