[Q]: How does the sentence end?

When Brenda coated her wood panels with varnish, the concrete surface beneath got stained. The varnish harmed and uglified the 
OPTIONS:
- wood .
- concrete .

[A]: concrete .
QUES: Continue writing.

I lost the keys to my lock somewhere in the boxes, because the 

OPTIONS:
- keys are so messy.
- boxes are so messy.
+++++++++
ANS: boxes are so messy.
Problem: How does the sentence end?

James dipped the dirty plate into the bowl of water and the 
OPTIONS:
- plate turned clean.
- water turned clean.
Answer: plate turned clean.
sentence: The boat tried sailing through the ocean rather than through the mountain. The  OPTIONS:
- ocean was a faster way to travel.
- mountain was a faster way to travel.
complete: ocean was a faster way to travel.
Donald was the better marketing consultant for the company than Benjamin because 
OPTIONS:
- Donald hated talking to people.
- Benjamin hated talking to people.
Benjamin hated talking to people.
Problem: Continue the following story.

Robert wanted carpeting on the floor and Eric didn't because 
OPTIONS:
- Robert knew that sweeping was cleaner than vacuuming.
- Eric knew that sweeping was cleaner than vacuuming.
Here's how I want to continue it:
Eric knew that sweeping was cleaner than vacuuming.