Some of you may have finished unit one., you can go on to unit two.
—You look so upset, Isabelle.? —I failed to pass the driving test last week.
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.