Problem: How does the sentence end?

The scientist poured the fluids from the test-tubes into the beakers until the
Answer: beakers were full.

Problem: How does the sentence end?

Neil unfollowed a teacher on facebook and Brian did not because
Answer: Brian used social media to communicate.

Problem: How does the sentence end?

Derrick helped Jeffrey to remove rust off his bike frame using baking soda , because
Answer: Derrick wants to ride with him.

Problem: How does the sentence end?

Megan wanted to buy a new pet from Rebecca so
Answer:
Megan asked what tropical fish she had for sale.