Problem: How does the sentence end?

The new computer ran faster than the old tablet because the 
Answer: computer had more memory and processing power.

Problem: How does the sentence end?

I bought a new pipe, but it didn't fit into the socket, because the 
Answer: socket was too skinny.

Problem: How does the sentence end?

The mask made the woman feel uneasy so she held the doll because the 
Answer: mask was scary.

Problem: How does the sentence end?

Dennis was an environmentalist and did not want Neil to use a water bottle, 
Answer:
Dennis insisted on metal.