Hi,
I believe the answer is B, "<span>The first word is a verb meaning "to pout"; The second word is a noun referring to a small motorbike."
~Elisabeth</span>
D: It is used to emphasize their great knowledge <span />
I think that the italicized word is "trained" as it's a participle and there is no other participle or gerund! A participle is a verb form that can be used to modify a noun.
