单选题 By watching the movements of the speaker's lips, a deaf person can actually see______the person at the other telephone is saying.
【正确答案】 C
【答案解析】本题测试what的用法。what既引导宾语从句，又同时在从句中充当saying的宾语。本句大意为：通过观察说话者的嘴唇的动作，一个聋人可以明白通话者说话的意思。