The speaker raised his voice but still couldn't make himself____.
[ ]
A. hear
B. to hear
C. hearing
D. heard
答案
D
考点名称：过去分词
过去分词的概念：
过去分词一般表示完成和被动的动作，只有一种形式。即：动词原形加-ed构成。
如：fallen leaves 落叶
boiled water 开水
I heard the door closed. 我听见门被关上了。
过去分词与现在分词被动式的区别：
两者均可表示被动，其区别主要在于它们所表示的时间概念不同，但有时它们也可表示相同的意思。
如：Written in haste, the book has many mistakes. 这书因写得仓促，所以错误不少。
Being written in haste, the book has many mistakes. 这书因写得仓促，所以错误不少。
Having been written in haste, the book has many mistakes. 这书因写得仓促，所以错误不少。
有时虽然所表示的时间概念相同，但有细微区别：
如：Having been show the lab, we left. 被领着看了实验室后，我们就离开了。