The boy was scolded by his parents ________what he had done.
The education of young is always hot and serious topic.
—Hey, taxi! —, sir? —Can you take me downtown?
—I don’t suppose Jimmy could have done well in the mid-term exam last week,______? --- ______ he almost failed in the exam.
It is strange that such a thing ______ in your school.
As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil.