If you don't work hard,it will be of no ________ for others to help you.
If you ____________ stop smoking, you can only expect to have a bad cough.
__________ , we'll come to see you again.
I think the doctor is able to cure of __________is called a suspect.
Let us not waste____________ time we have left.
Mrs. Green wants to buy that kind of cloth because she___________ that the cloth__________ very well.