My cousin was not able to put the cases on the shelves, because the 
OPTIONS:
- cases were too heavy.
- shelves were too heavy.
cases were too heavy.

Rachel was a waiter but Angela was customer, so 
OPTIONS:
- Rachel  had to serve the food for dinner.
- Angela  had to serve the food for dinner.
Rachel  had to serve the food for dinner.

Amy went to a buffet. She couldn't finish eating the eggs but could eat all the tomatoes because there was a minuscule amount of the 
OPTIONS:
- tomatoes on her plate.
- eggs on her plate.
tomatoes on her plate.