问题
选择题
The professor ______ his voice to make himself ______.
A．rose; heard
B．rose; hearing
C．raised; heard
D．raised; hear
答案
C
题目分析：考查动词。句意：教授提高他的声音目的是让他自己的声音被听到。Raise 提高，及物动词。Rise 升起，不及物动词。Make oneself heard ,让自己被听见，所以选C项。
考点 : 考查动词