Language Arts Editing Tasks

"I _______ buy that dress if I have enough money left" Geena said.

What is the meaning of the idiom ?The test was a piece of cake.

The new diner was all the rage.

After seeing the guard dog,Christyler decided he ____________ not enter

Sam was on the fence about going to the party.

Julie and Patty are like day and night.

The drama teacher warned that we all  ________  know our lines.