问题
选择题
— What made Bill so angry?
—____________. His girl friend promised to come at 8:30, but she hasn’t come yet.
A．Having kept waiting
B．Being kept waiting
C．To be kept waiting
D．He was kept waiting
答案
答案：B
本题考查非谓语动词的用法。此处应用动名词短语回答提问，作句子的主语，同时动作又表示被动，故用动名词的被动式。