—What does PM 2.5 mean?—It's a professional ________ indicating the condition of air pollution.
Doctors have said that as many as 50% of patients don’t take medicine_______.
You may take them all home_______.
—Which would you like, chicken or fish? —_______
—You seem to have lost your way. _______? —I’m looking for Wangfujing Street.
—I didn’t do well in the last English test.How about you? —_______.