求英语大神分析一个句子的语法,谢谢!His father was a teacherwho _______deaf-mutes l_英语解答

求英语大神分析一个句子的语法,谢谢!
His father was a teacherwho _______deaf-mutes learn how to speak.
A which was helped
B that was helped
C who helped
D who has helped
选啥?为什么?

人气：274 ℃　时间：2020-06-23 11:53:31

解答

你好,为你解答,正确答案为：
C who helped
他父亲过去是一名帮助聋哑人学习如何开口说话的教师.
不明白请及时追问,满意敬请采纳,O(∩_∩)O谢谢就你吧，我也选的C，但是书里是D，所以疑惑了D 是现在完成时。
用一般过去式就可以的，选C没问题。