[Q]: How does the sentence end?

Sarah talked in school much less than Rebecca did because 

[A]: Sarah was much more shy.


[Q]: How does the sentence end?

Lawrence was out walking their dog when they ran into Donald who they did not like very well, so 

[A]: Donald got scared of the dog.


[Q]: How does the sentence end?

In order to clean the vomit from the carpeted floor, the custodian used the vinegar rather than bleach, since the 

[A]:
bleach was caustic.