______ many new words in lesson one,It is very easy.

______ what we have now, we can’t afford so large a house

May I speak to Robert—- _________ .

–What did Mr Jones do before he moved here-He_______ a city bus for over twenty-fiveyears.

y a meteorological observatory _____ air quality in urban areas from one to five:excellent, fairly good, slightly polluted, poor, and dangerous.