President Obama held talks with Chinese President Hu Jintao in Beijing, ________ economic recovery, climate change and stopping the spread of nuclear weapons.
— Should I follow in my father’s footsteps and study medicine? — __________________.
_____ neither you nor your brother interested in swimming?
—Why weren’t you at the meeting? —I____ for a long distance call from my sister in America.
The driver has much experience of driving, and _____ he behaved very calmly in the dangerous situation.
_____ my daily work at school, I spare a few hours each day to practice playing the violin at home.