.-- His father is a professor and has been teaching in the university for more than twenty years. -- _____.
____ the temperature falling so rapidly, we couldn't go on with the experience.
--- Do you know Uncle Tom is crazy about gardening? ---Sure. He ____ his flowers in the garden now.
He is neither______ European, nor______ American. He is from______ Australia.
Is there a bookshop around ______ I can buy an English and Chinese dictionary?
---If you like the new house, I suggest you buying it.---But it's really too expensive. I can't______ it.