河南成教 / 英语语言学
正确率：100%
7.. Phrase structure rules allow us to better understand _____________.
A.A. how words and phrases form sentences.
B.?B. what constitutes the grammaticality of strings of words
C.?C. how people produce and recognize possible sentences
D.D. all of the above.
参考答案：
佳题速递：