.--- I hear Robert has gone to Harvard University for his master’s degree. --- Oh, how nice! Do you know when he ____?
With summer coming on, the weather gets hot _________.
In Switzerland, six miles west of Geneva,___________ a collection of laboratory buildings.
America was____________ was first called" India" by Columbus
To everybody's surprise, the fashionable young lady ___________ to be a thief. A. found out B. proved out C, put out D. turned out
Collecting stamps as a hobby___________ increasingly popular during the past fifty years.