问题
选择题
I was close to being killed the other day. A car passed me at ____ I thought was a dangerous speed.
A．as
B．which
C．what
D．that
答案
答案：C
考查名词性从句。what was a dangerous speed 作 at 的宾语。 I thought 是插入语， what 在宾语从句中作主语。选C。