Experts at the conference agreed that such a product with environmentally friendly technology is ______.
One of the men present held the opinion ________ the book said was wrong.
Mr Smith sold his house on the sea________2,000,000 dollars.
________ happens in the world makes us happy and sad too.
It was a pity that the famous painter died _____ his work unfinished.
In some western countries, ________ are called “public schools” are not owned by the public.