To meet the need of the London Olympic Games in 2012, many new stadiums are reported to________ in Britain.
It is our duty to try to ______ production and reduce the number of things we make and buy.
Our factory has been developing rapidly this year. This year’s production is five times _____ it was ten years ago.
We should produce less things from raw materials, _____ is growing smaller and smaller.
As fuel prices rose, bus companies raised their fares and _____.
Friendships between girls are usually ________ shared feelings and support, but friendships between boys are based on shared activities or interests.