---________ are you going to stay here?
---Five days.
--What was wrong with Kate yesterday?
--An accident ________ her.
---Would you mind lending me a hand?
---______.I'm busy with my work right now.
--What were children like in the past?
--________ of them had little food to eat and couldn't ________ warmly.
---Where ________ my keys?
---In the book.
---________ is your brother?
---He is at school.
---Where are the books?
---________ on the sofa.
---A:Are dogs ________ difficult ________ take care of?
---B:I think so.
---A:Shall we ________ a delicious meal?
---B:Sorry, I'm busy now.
---A:What is your best gift?
---B:I got a pet cat on ________ tenth birthday.