The theory he sticks to ______ to be of no use in our studies.
— It’s the office! So you ______ know eating is not allowed here.— Oh, sorry.
Nowadays people sometimes separate their waste to make it easier for it ______. .
She is very dear to us. We have been prepared to doit takes to save her life.
Would you please keep silent? The weather report andI want to listen.
The collapse of the World Trade Centre has put US economy in a difficult ___________.