Though plastic bags really bring convenience to us,they also ________ many problems for the environment.
Linda __________ her glasses with a dry soft cloth.
He told me that in the following days there were other changes, even more _________.
–Did you enjoy yourself yesterday? --Yes. As you saw, ____ party went on in ____ most pleasant atmosphere.
— Sorry, I made a mistake again. — _______. As long as you practice more, you’ll succeed one day.
Madame Curie is believed _______ radium.