Fill in the blanks with the suitable conjunction:
He was angry _____ he heard what happened.
because
when
so
or
Sailing in summer is great, ______ I don't have a sailing boat.
and
but
unless
I heard a noise _____ I turned the light on.
Do you pull the handle _____ push it?
as
This drug has serious side effects ________ its sale has been banned.
She will die _____ the doctors operate immediately.
although
This is an expensive ________ very useful book.
The engine developed some snag ________ the flight had to be delayed.
therefore
He will not come ______ he is invited.
We will go swimming next Sunday _______ it's raining.
until