(2014届浙江省宁波市十校高三3月联考英语试卷) The black baby boy is at the stage he can only say a few simple words but not yet full sentences.
Bicycling is good exercise; ____, it does not pollute the air.
Mary is really good at taking notes in class. She can almost every word her teacher says.
When ________ questions in class, one should answer them as clearly as possible.
It was not until I came here ____ I realized this place was famous, for not only its beauty but also its weather.
—How much shall I pay for the phone call? —You________. This is free of charge.