1. Li Lei sits ________ ________ (紧挨着) Liu Mei.
2. There is a restaurant ________ (在……上) Center Street.
3. Tom is standing ________ ________ (在……对面) the sh op.
4. I want to plant a tree ________ _________ ________ (在……前面) our house.
5. There is a park ________ (在……后面) our school.
6．My mother works in a __________(医院).
