My boss is waiting for the report, so I can't leave here _______I finish it.( )
since
until
though
if
______ they are twin brothers, ______ they don't look like each other.( )
Although; /
Although; but
But; although
Do you know whose book it is?
Oh. It ______ be Lucy's. Look, her name is on it.( )
can't
must
shouldn't
Her parents bought a new car for ______.( )
themselves
herself
themselfes
The computer is one of the most important ______.( )
inventor
inventions
invention
______ book on the desk is ______ useful one.( )
The; an
A; an
The; a