Is this Tommy’s suitcase?— No, it is not . It is .

Shopping on line is very popular .We find easy to shop on line .

People in the west usually wear special costumes _____ masks at Halloween.[ ]

The guidethe students around Zhang Jian’s Former Residence（张骞故居）last month.

I watched ______ film Let the bullet fly with my friend last night.—Oh, really? It’s really ______ interesting one.