--who helped them finish the work?________. They did it all by themselves.
–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.
– Do you know ?– Yes, I do. He went by skateboarding?