Clothing made of man-made materials has advantage over ____ made of natural ones like cotton, wool or silk.
There is only one of the oldest customs that ________ in this district so far.
_______ with so much trouble, we failed to complete task on time.
When we visited our headteacher again ten years later, he had changed so much that we could hardly ________ him.
Your new product ________ better if it is advertised on TV.
______ has finished the work ahead of time will be rewarded though we don’t know______ it will be.