Here are some examples:
Washing dishes is a thankless job.
Although the garbage collector knew his was a thankless job, he worked hard to do a good job.
Teaching is a thankless task.
Writing this sentence is a thankless task.
grading papers is a thankless task
"This is a sample of how to use the word 'sample' in a sentence."
Wendy was very thankless to her her uncle because she didnt help him.
This sentence is a SAMPLE sentence.The boy wanted a sample of the food.The woman wanted a sample of the perfume.The man wanted a sample of the wine.
Sample sentence- What is the purpose of you writing this sentence?
A sample of the girl's DNA led to the breakthrough in the case.
thankless, unappreciative, ungrateful
He submitted an application.
Are you confident you can do this
he is a typist