In some countries where there is not enough coal, water is used to ____ electricity.
Last moth, part of Southeast Asia was struck by floods, from ___ effects the people are still suffering.
If you go by ____ train, you can have quite a comfortable journey, but make sure you get ___ fast one.
If you grow up in ___ large family, you are more likely to develop ____ ability to get on well with ____ others.
--It is often said that ______teachers have _______very easy life.
—What’s wrong with your coat?--Just now when I wanted to get off the bus, the man next to me _______on it.A. sat B had sat C. had been sitting D. was sitting