---Could you tell me ________?---Sorry. I don’t know. I didn’t attend the meeting.
Vienna,the capital of Austria,is the River Danube and The Blue Danube is auss.
Where's Tom? His mother ______ him now.
You will find ______ useful to learn even a little English.
By the first day of August, 2007, the PLA ________ for eighty years.
Have you ever gone ?