问题
选择题
Many people wrote articles on ___Liu Xiang had failed to compete in the event .
.
A．why
B．what
C．who
D．that
答案
答案：A
“___Liu Xiang had failed to compete in the event .”做介词on的宾语，宾语从句中不缺主干，故排除B.和C.。另外that不引导介词的宾语从句（固定搭配除外），所以排除D. that