---How long has the train been away?---Sorry. I don’t know. By the time I got here, the train ________.
---Doctor, it seems ______ you like to work with animals. ---Yes, I think animals should ______ as our friends.
---Have you seen him recently? ---Yes. I him the other day on the street.
To our _________, Hawking didn’t worry about his problems in the slightest, _________, he just face the problems.
It is our duty ______much attention to ________ our best to keep our city clean.
If I were you, I’d talk ______someone ______looks friendly.