_____ is known to all is that effective measures should be taken to deal with the problem of the over-exploiting of our resources.

________, Gao Xiaosong was sentenced to 6-month imprisonment–the most severe punishment about drunk driving–on June.1. 2012.

If I remember correctly， _______was ten years ago that your brother went to Canada.

As a new graduate，he doesn't know ________it takes to start a business here.

When I met him the other day，it was the first time we ____ each other since we graduated from school.

The weather turned out to be very good,        was more than we could expect.

The limits of a person’s intelligence, generally speaking ,are fixed at birth, but       he reaches these limits will depend on his environment.

Only after Ann read her essay the second time       the spelling mistake.

—Are you still working in that company, Mary?
—No, it is ten months ____ I worked there.

With the nuclear crisis worsening in Iran, the world's attention is fixed again on     is called the Middle East.