Fire,on the one hand,can benefit the world. On the other hand,it can also destroy the world if not________under control.
It's important for us to employ a word or a phrase according to the _________ in language studies.
My goodness, how lucky we are! If there had been p1aces for us on the aero plane, we _____dead now.
However, in ________ recent years, _________ Niagara Falls have come to be appreciated more for their natural beauty as _________ wonder of Nature.
She was in hospital for about half a year. He felt as if he was ___________ from the outside world.
—Mike, the phone is ringing. Do you want me to answer it? —No, sit still. ___________ .