The Internet has brought _______ big changes in the way we work. 

Our enemy bills have been increasing steadily．     these costs，our telephone costs have doubled over the past six months．

Attention，coffee lovers! We have for you，the best coffee machine ______ invented．

The hurricane damaged many houses and business buildings；_________，it caused 20 deaths.

The performer was waving his stick in the street and it ___ missed the child standing nearby.

I hear____ boys in your school like playing football in their spare time, though others prefer basketball.

There was such long queue for coffee at the interval that we ________ gave up.

— Must I turn off the gas after cooking ?
— Of course . You can never be____careful with that .

－Is your headache getting_____________?       － No, it’s worse. 

David has won the first prize in singing; he is still very excited now and feels________ desire to go to bed.