In face of _____failure, it is the most important to keep up _____ good state of mind.
.________ relation between China and Russia has developed steadily since Vladimir Putin was reelected ________ president last May.
I have learned that it's taking ________ long time to become ________ person I want to be.
Because of H7N9 bird flu, all the chicken markets in Shanghai have been closed and won't open until further ________.
One reason for her ________ for city life is that she can have easy access to places like shops and restaurants.
—What does PM 2.5 mean? —It's a professional ________ indicating the condition of air pollution.