. At the age of 29, Dave was a worker, ________ in a small apartment near Boston and ________ what to do about his future.
——Hi, John. Are you busy? ——
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.