Question #adb4b

1 Answer
Apr 28, 2017

Posters which they displayed in the public library were designed by the students.

Explanation:

In the first sentence, "Posters which they displayed in the public library" is taken as its subject and the voice change is done accordingly.

Take a look at the second sentence-

A beach cleanup was undertaken and over 15 sacks of garbage were being collected by members of the school's Environmental Club.

I have changed both "bench cleanup" and "garbage" sections into passive form to make it meaningful.