Problem: How does the sentence end?

Monica studied quite hard to learn Marathi but Angela didn't. 
Answer: Monica speaks Marathi very fluently.

Problem: How does the sentence end?

The app was easier to install on the computer than the phone because there was more free space on the 
Answer: computer .

Problem: How does the sentence end?

Passing a drug screening was going to be difficult for Samantha but not Natalie because 
Answer: Samantha smoked a lot of marijuana.

Problem: How does the sentence end?

Sarah had worse symptoms than Tanya, so 
Answer:
Tanya was seen by the emergency room doctor second.