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1. He often swam in this river

=> He used to ...............................................................................

2. My father used to smoke 

=> My father stopped 

...............................................................................

3. The man is an computer expert. You were talking to him

=> The man to whom 

...............................................................................

4. Tom started learning English four years ago.

=> Tom has 

...............................................................................

5. They have built our new school since 2005.

=> Our new school 

...............................................................................

6. The street I live in is very noisy. This makes it difficult to sleep(using connector which)

=> The street I live in is very noisy ...............................................................................