The zoologist is telling the visitors how a horse’svision differs from ______ of a human

_____ the lawyers, volunteers from the Libyan Red Cross Society also joined the efforts in helping the Chinese go home safely

The teenagers usually have many problems at school, and they don’t know ________ them, so we should give them some help.

Her mother_________ having read the letter when Mary found the envelope open.

Was it because his mother was ill ______ he didn’t go to school?