— I wonder at 6:00 yesterday afternoon.— I was doing my homework in the reading room.
----who ____the money and food to the people in the earthquake? -----some young people from Beijing.
---I have been to Qingdao before. ----- .
—We really shouldn’t use plastic bags any more when shopping. —_____ It’s important to protect our environment.
—Our country ___progress in science and culture in recent years.
_____he is very tired , _____he still goes on working.