By the time they are going beyond the telegraphic stage, childre

By the time they are going beyond the telegraphic stage, children begin to incorporate some of the ______ morphemes which indicate the grammatical function of the nouns and verbs used.
A、bound
B、inflectional
C、flectional
D、free
【正确答案】：B
【题目解析】：By the time they are going beyond the telegraphic stage, children begin to incorporate some of the inflectional morphemes which indicate the grammatical function of the nouns and verbs used.