Answer:

4. The hockey girls burst around the corner in front of him as they collapsed into each other.

5. that she saw the kitten that caused the plantive mewing that she's been hearing for days.

Explanation:

4. The evidence:

On the first line, it's been mentioned that Harold was reading an exciting book that he couldn't put it down. Harold continued to read it almost everywhere he went. And when a few girls from the hockey field burst out from the corner while he was still reading, there was a possiblity of them collapsing into each other.

Definition of burst out

1 : to begin (doing something) suddenly They both burst out laughing. 2 : to say (something) suddenly Everyone burst out "Surprise!" as he walked through the door.

5. It's been mentioned that Lily has been hearing a plaintive mewing for days. A plaintive meow is a sign for a cat asking for help. The paragraph also mentioned that she hasn't been able to find the source of the sound.

"But it wasn't until" the sentence led to the conclusion that whatever happened next tells the story of how she found the cat that has been causing the sound

Hope this helps </3