A team of American scientists has found a treatment to protect humans from the deadly H5N1 flu virus, ________ brings great ________ to the world.
Great changes have taken place in that school. It is no longer ___ it was 20 years ago, ___ it was so poorly equipped.
This book will show you ________ can be used in other contexts.
---Do you mind my smoking here?--- __________. Look at the sign! It says, "No smoking!"
Can you tell me how to deal with such cases ____students can’t get along well because of different personalities?
---- The weather isn’t good enough for an outing, is it?----- Not in the least. We couldn’t have___ at this time of year.