I have 2 table, joins on id number. How do I get a result set that includes deleted records in the primary table, but exclude deleted records in the join table?

set deleted off
select last,tbl1.id,descr from tbl1 ;
left join tbl2 on tbl1.id=tbl2.id

The above will give me:
lastname1, id1, descr1
lastname1, id1, descr2
where in tbl2, I have these records:
id1,descr1 (deleted record)
id2,descr2

What I need is:
lastname1, id1, descr1

How can I accomplish that?
THANKS ALL!