I ________my homework while my parents _________TV last night.

The plane ____________when I got to the airport. I nearly missed it.

I ______ along the road when I saw Peter. So we stopped and had a chat.

While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.

If you don’t work hard for most of the year and then work hard for only a few days before the exam, you will probably .