Yesterday I was walking downstairs when I missed my foot and had a bad fall, nothing serious, ______.

–         did Prince William's wedding last?
– It lasted for about 5 hours.
A. How far                 B. How long            C. How soon  

It is the prevention of disease_____ its successful treatment that has led to the rapid increase of the world’s population.

It seems that living green is _______ easy and affordable. A small step makes a big difference.

The shooting center is about 50 kilometres ________ the city of Beijing.
A. in south of       B. the south of    D. southern of  D. south of

Everything has gone smoothly with the project so far. __________ it’s believed to be completed on time.

I wasn’t blaming anyone: I ________ said errors like this could be avoided.

— So you missed the meeting．
— ______. I got there five minutes before it finished.

It is believed that high achievers work toward personal standards of excellence ______ material rewards.

The train stopped ______ at lonely little stations, which resulted in a sleepless night.