XP may contain more than just X. Phrases that are formed of more

XP may contain more than just X. Phrases that are formed of more than one word usually contain head, ______ and complement.
A、modifier
B、determiner
C、qualifier
D、specifier
【正确答案】:D
【题目解析】:XP may contain more than just X. Phrases that are formed of more than one word usually contain head, specifier and complement.