Problem: For his dogs, Matthew feeds them a lot of meat, while Ryan's eat mostly grains. 
OPTIONS:
- Matthew 's dogs are happier.
- Ryan 's dogs are happier.

My choice: Matthew 's dogs are happier.
[Q]: How does the sentence end?

The teens of Rachel are better behaved than the ones Mary has because 
OPTIONS:
- Rachel is more stern.
- Mary is more stern.

[A]: Rachel is more stern.
QUES: Continue writing.

I wrote a few letters and sent them to three universities, but they weren't received because the 

OPTIONS:
- universities were lost.
- letters were lost.
+++++++++
ANS: letters were lost.
Problem: How does the sentence end?

Sarah was eligible for a promotion from Felicia next week, and 
OPTIONS:
- Sarah finally got the promotion.
- Felicia finally got the promotion.
Answer: Sarah finally got the promotion.
sentence: I poured pure beach sand into the Hermit Crab's animal cage until the  OPTIONS:
- animal was full.
- cage was full.
complete: cage was full.
Input: Continue writing.

Kenneth told Neil that he is building his own backyard fence.  
OPTIONS:
- Kenneth is amazed by him.
- Neil is amazed by him.

Continued:
Neil is amazed by him.