She laid a tablecloth ______ the dining table to keep dust ______ it.
Free medical service is _____ to all the members of the factory.
Many things _____ impossible in the past are quite common today.
Have you ever been to Mount Huangshan, _____ is famous for its towering pine forests and "sea of clouds"?
We _____ his idea for a music club, and decided to have an art club _____.
---Have you heard of this new computer brand, Mike? ---Yes, of course and I’ve decided to buy _____.