laughable

"You must do your homework before you can watch television."

"It was worth the attempt."

"His suggestion to skip the homework was met with laughter and derision by the teacher. "

"The comedian's jokes were humorous, making the audience laugh. "

"The old, tattered textbook was worthless to the student preparing for the exam. "

"Please completely fill in the box for your answer, using a number 2 pencil."

"Their loud laughter betrayed their presence."

"A squirrel scurried up the oak tree in the park, its bushy tail twitching. "

"The fireworks which opened the festivities excited anyone present."

"It fits the purpose."

"Everyone in the class needs to bring their textbook to the first lecture. "

"His contempt for the new teacher was obvious; he scoffed at her ideas and ignored her instructions. "