[Q]: How does the sentence end?

The child was very good at reading, but not at math, because 
OPTIONS:
- reading is boring to the child.
- math is boring to the child.

[A]: math is boring to the child.
QUES: Continue writing.

Dennis loved to paint but William preferred crayons since they left no mess, so 

OPTIONS:
- Dennis bought only crayons.
- William bought only crayons.
+++++++++
ANS: William bought only crayons.
Problem: How does the sentence end?

The erupting volcano spewed molten lava, ash and smoke into the sky until the 
OPTIONS:
- sky was empty.
- volcano was empty.
Answer: volcano was empty.
sentence: Kevin valued their friendship with their siblings but Jason didn't,  so  OPTIONS:
- Kevin visited their sibling's home rarely.
- Jason visited their sibling's home rarely.
complete: Jason visited their sibling's home rarely.
Aaron showed Hunter his swelling foot and asked 
OPTIONS:
- Aaron if he could give him one of his magic foot massages.
- Hunter if he could give him one of his magic foot massages.
Hunter if he could give him one of his magic foot massages.
Problem: Continue the following story.

The test could not determine the strength of the battery, but worked fine for the plug , since the measurement for the 
OPTIONS:
- battery was concrete .
- plug was concrete .
Here's how I want to continue it:
plug was concrete .