1. To return to the problem of water pollution, I’d like you to look at a study __________ (conduct) in Australia in 2012. 2. In art criticism, you must assume the artist has a secret message _________ (hide) within the work. 3. The park was full of people, _________ (enjoy) themselves in the sunshine. 4. Volunteering gives you a chance _________ (change) lives, including your own.

考点题例二

conducted

enjoying

hidden

to change