27.The students wonder______ good the course will do to their future jobs.
.________ 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.