— David, your mother’s birthday is _____. Let’s think about how to celebrate it.—OK, Dad.
She is the girl whose painting won the first in school competition.
–We’ll go to the supermarket if it .– Really? The thing is, who knows when it ?
– Would you like camping with me?–I’d like to, but I’m busy my homework.
–You look worried! What’s the matter?– My dog was lost. I it everywhere.
– Look at the smog. (雾霾) bad weather it is!–It is ! Everyone should realize important protecting the environment is and take actions.