Problem: Continue the following story.

Since Laura liked fish while Natalie  was a cat lover, 
Here's how I want to continue it: Natalie was often cleaning a litter box.

Problem: Continue the following story.

The infection blocked his nasal passage, but the medicine cleared it up, the 
Here's how I want to continue it: medicine was voracious against it.

Problem: Continue the following story.

The throat was relaxed by the syrup but the oil just caused more coughing, as the 
Here's how I want to continue it:
oil was abrasive.