“When did he leave the classroom” “He left_______ you turned back to write on the blackboard.”

We don’t write to each other regularly，but we do keep intouch by telephoning _____.

Would you like to go to the cinema with us—It sounds like fun, __________ I’m too busy.

_____ to severe problems in theirlife

A passenger ship carrying 458 people sank(下沉) _______ about 9：28 pm_______ the night of July 1 in the Hubei section of China’s Yangtze River.