问题：
[单选题]Generally, the weak and quick spoken words in sentences are:
Aprincipal verbs, nouns, adjectives, adverbs, and numerals.
Bpronouns, prepositions, articles, conjunctions, and auxiliary verbs.
[单选题]Generally, the weak and quick spoken words in sentences are:
Aprincipal verbs, nouns, adjectives, adverbs, and numerals.
Bpronouns, prepositions, articles, conjunctions, and auxiliary verbs.
