Can it have been on the playground ________ you lost your watch ?
My uncle now teaches French in a famous domestic university, who _____ in Paris for 6 years.
News came from the local government ______ the new graduates had some difficulties in opening their own business, they would be financed.
Not having worked out the problem, ______ leave the office.
Nowadays, many people walk to work______ Copenhagen Conference calling for living a low—carbon lifestyle to cope with global warming.
The traffic slowed down because of the heavy snow in Yushu County, presenting a new ____ to the recovery from the earthquake.