Professor White contributed a lot to our community,().
1. Jim has learned English for three years.
Jim began to learn English three years().
2. Jim studies English for two hours every evening.
Jim()two hours studying English every evening.
3. Jim speaks English better than anyone else in his class.
Jim speaks English better than the()students in his class.
James Watt()the steam engine.
On my left()a wide river;on my right,a dark forest.
The firemen tried their best to()the fire but in vain.