Problem: How does the sentence end?

She filled the compost pile up with leftover food in the dirt. While the worms ate, the 
Answer: food dwindled.

Problem: How does the sentence end?

Megan was dreading for the test in class but not Angela because 
Answer: Megan was a poor student.

Problem: How does the sentence end?

Jane wanted her doll back because she now hated the toy car. The 
Answer: car is ugly.

Problem: How does the sentence end?

So 
Answer:
Adam wanted to be an astronaut so Adam can visit the stars out in space, while Benjamin is scared of the unknown.