“Mum !” she cried suddenly , tears down her cheeks .
Christopher ________ charity work by raising a lot of money to promote medical research.
Yang Liwei showed the flags of China and the United Nations, ________ the wishes of Chinese people to use space peacefully.
-- The last one ________ pays the meal. --- Agreed.
She had to leave school_______ her family couldn’t afford her education.
The old man has retired from the factory. He _____ there for 30 years.