We met an old friend in London _________ our expectation. She waved at us ________ the street when she saw us.
The global warming is more and more serious, for which human beings ______.
--- Grace won’t like it, you know. ---______ ? I don’t care what Grace thinks.
It is said in the book that Tomas Edison (1847-1931) _______ the world leading inventor for thirty years.
The old couple preferred a flat in a small town to ______ in so large a city as Chongqing.
In the face of ______ failure, it is the most important to keep up _____ good state of mind.