问题补充：
When it was his turn to deliver(发表) speech, , he walked towards the microphone.
A. nervously and embarrassingly
B. nervous and embarrassedly
C. nervously and embarrassing
D. nervous and embarrassed
答案：
A. nervously and embarrassingly
B. nervous and embarrassedly
C. nervously and embarrassing
(答案→)D. nervous and embarrassed
解析：考查形容词用法。本题中的embarrassed是由过去分词转换的形容词，用来修饰人或者与人有关的事情。形容词nervous and embarrassed对句子的主语he的情况进行解释说明；句意：当轮到他发言的时候，很紧张尴尬，他朝麦克风走了过去。故D正确。
