These teenagers don’t know much of the world yet; that’s why they are so easily  _____ .

u enjoy yourself at theconcert—-Yes, I could not have myself________.—-It was perfect.

There are _______ in the reading room, but some aren’t ________ for the students to read.

下列各项没有语病且表意明确的一项是（ ）

So absorbed_____in her work that she didn’t realize I was behind her.