This also keeps the air,soil,water crops________ chemicals.
I was coming to your party but my car’s gone wrong. Now I can’t ________it.
More and more problems appeared ________the increasing use of short messages sent by cell phones.
—Hey ,it’s you, Jackie! I didn’t think you could be here. —A big surprise ,right? I _______ for you all the afternoon.
I soon found that the work I was doing had already been done by someone else.________,I was wasting my time.
________other workers,the boss finds,Hank is ________worker in his company.