Problem: How does the sentence end?

Cynthia was very keen that their home should be clean but Jessica was not, because 
Answer: Cynthia was very houseproud.

Problem: How does the sentence end?

Donald wanted some coffee, but Derrick decided not to have any because of the hot climate.  
Answer: Derrick refused it because they didn't like the temperature.

Problem: How does the sentence end?

Tanya volunteered to donate her kidney to Betty since the doctor said 
Answer: Betty was very sick.

Problem: How does the sentence end?

James needed a bigger box to collect the silver he exchanged for the gold because the 
Answer:
gold is smaller.