The field research will take Joan and Paul about five months; it will be a long time __________ we meet them again.
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.