单项选择题
Tom could hardly （） his excitement as he knew that he had made a real dis covery.
A．conceal B．reveal C．show D．discover
单项选择题 His desire to （） other people has caused trouble in his family.
单项选择题 The coming of automation is （） to have important social consequences.
单项选择题 The police （） to emergencies in just a few minutes when the accident happened.
