Much of our grammatical knowledge is represented through Phrase Structure Rules, which state explicitly all and only the possible combinations of the ______ of a language, for example, in English, NP→(Det) (Adj) N (PP) (S).
A、phrases
B、clauses
C、sentences
D、constituents
【正确答案】：D
【题目解析】：Much of our grammatical knowledge is represented through Phrase Structure Rules, which state explicitly all and only the possible combinations of the constituents of a language, for example, in English, NP→(Det) (Adj) N (PP) (S).