1. All flights have ______ (cancel) because of bad weather.
2. Thank you very much for your ______ (introduce).
3. This railway line _______ (connect) London to Edinburgh.
4. He had finally ______ (achieve) success.
5. We are ______ (pride) of what he did.

1. Edison is one of the greatest _____(invent) in the world.
2. The gravity on the surface of Mars is about one _____(three) as strong as it is on the earth.
3. Make sure you _____(recorder) the numbers of tickets you sell.
4. This railway line _____(connect) London to Edinburgh.
5. Scientists think that there _____(be) life on the earth for millions of years.

1. Edison is one of the greatest ________ (invent) in the world.
2. The gravity on the surface of Mars is about one ________ (three) as strong as it is on the earth.
3. Six books have been written by her, ________ (include) the story book.
4. This railway line _________ (connect) London to Edinburgh.
5. Scientists think that there _________ (be) life on the earth for millions of years.