Problem: How does the sentence end?

Maria was perfectly happy being in a relationship with Tanya, so 
Answer: Maria wanted to stay together forever.

Problem: How does the sentence end?

William wanted Jeffrey to clean his pet snail's shell because 
Answer: William knew nothing about snails.

Problem: How does the sentence end?

Betty always wasted money while Rebecca maintained a budget, so 
Answer: Betty always bought needless things.

Problem: How does the sentence end?

The jeep easily prevailed in its clash with the tank, as the 
Answer:
tank 's crew was inept at combat tactics.