Fill in the blanks with the suitable conjunction:
She has not called ______ she left last week.
Since
Or
But
So
I would like to come with you _____ I am too busy.
And
For
Unless
I was very lazy _____ I was young.
Because
Then
When
Until
I heard a noise _____ I turned the light on.
Walk quickly _______ you will be late.
Let us wait here _____ the bus comes.
Frogs can hop , _____ they can't hear well.
_______ the car is old it still runs well.
Although
Sailing in summer is great, ______ I don't have a sailing boat.
so
This is an expensive ________ very useful book.
