I think Where Are We Going, Dad is the hottest show this year.– People of all ages like it.

This summer holiday I did an English coursewhich ____ for four weeks.

Rather than go through the extreme hot weather and see the World Expo, I prefer ______ at an air-conditioned room and watch TV.

With the help of high technology, more and more substances _________ in the past years

按字母表顺序排列的一组字母是 。