A low-carbon(低碳) lifestyle has an effect our daily life. People are paying more and more attention to energies these days.
—You study________hard________you’re sure to pass the exam. —Thank you for saying so.
—Who broke the window? —________.A strong wind broke it last night.
Many students said that they were willing to work hard to make their dreams________true.
I________football when l was a child.
—________do I save the document on the computer? —Please click“save”and write a name for it.