（2007年普通高等学校招生全国统一考试全国卷I，7） ___ felt funny watching myself on TV

If we want to work for our country in the future，________，we should have a strong body and rich knowledge．

Knowing their son failed in the exam, the parents stood there, ________.

Our planet is about yearsold.

To appreciate that it’s not easy for you, but you ______ try to get here on time．