Mr. Green ____ go to bed ____ he finished his work last night. A. does; until B. don’t; until C. didn’t; until
---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.