High school students are supposed to be about public services,which will benefit them in the long run.
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.
Tom apologized for______ to inform us of the change in the working plan.
Progress so far has been very good. ______, we are sure that the project will be completed on time.