Phrasal verbs are idioms which are composed of a（ ）plus a prep,

Phrasal verbs are idioms which are composed of a（ ）plus a prep, and/or a particle.
A、noun
B、verb
C、adjective
D、adverb
【正确答案】：B
【题目解析】：本题考查动词短语的概念。动词短语是由动词和介词，或者动词和小品词结合形成的。例如，look+into（vi. + prep）= investigate所以本题选B。