--What a clean kitchen!--Yes, and it _____ by my mother every Saturday.A. cleans B. is cleaned C. has cleaned
---Mom, Where are my keys? Do you know?--- I _____ they’re in your schoolbag.
---Do you like ice-cream?--- _____ .It’s so sweet. I don’t want to be fat.
---Thanks for _____ me, Ms. Green.--- You’re welcome.
---What are in your pencil box, Mike?--- Some _____ are in it.
---_____at this picture! Isn’t it nice?--- Yes, it’s so nice.