The Alibaba Group, _____was founded in 1999, has become China’s largest e-commerce company.
_____ his father came back from work_____ his homework.
Only when _____ in 1945 _____ to his hometown.
It is ______you deal with difficulties that shows_____ you are really like.
_____only 20 minutes to go before the train left, I felt uneasy in the taxi to the railway station.
---John has got a very good job in the government. --- _____ he looks so happy.