We should pay close attention to safety in schools because of frequent reports about accidents ____ students got injured or killed while in school.
—What does PM2.5 mean? —It's a professional ________ indicating the condition of air pollution.
Some students think they enjoy reading just out of interest, but others argue that a better score is their main ________.
Currently, many American women are still faced with the ________ of choosing between work and family commitments.
After ________ careful consideration, they finally decided that each child will be offered ________ university education.
Sometimes it's a bit challenging to reach a ________ between parents' expectations and their kids' desires.