Fill in the blanks with the suitable conjunction:
You have to speak louder ______ he can't hear well.
and
but
because
unless
Walk quickly _______ you will be late.
or
when
so
This is an expensive ________ very useful book.
He had to retire _____ of ill health.
as
He was angry _____ he heard what happened.
_________ she signs these papers, she will get the loan.
Therefore
Unless
So
If
The engine developed some snag ________ the flight had to be delayed.
therefore
This product is very good and cheap ______it does not sell.
otherwise
yet
We will go swimming next Sunday _______ it's raining.
until
They batted badly, _____ they won the match.