________I was in the US,I made a lot of American friends.
Science is really _______ useful sucject although it is very difficult.
–We can invite our teachers to the party next weekend.-- Yes. __ ? I’ll call her at once.
If you don’t understand it, you can ask the teacher , and it’ll become .
--- Could you tell me ?---Yes, they to the library.
This is easy job that I can finish it in half hour.