—What are they doing at the bus stop?—They are waiting for a bus________.
---Nanjing develops so fast. A fourth underground line is being built. ---That’s true. It __________ a lot already. A. changes B. changed C. has changed B. will change
--- _____________ have you studied in this middle school? --- Nearly 2 years.
--- ____________ you seen the 3-D film Titanic yet? --- Yes. I __________it a few days ago.
---How hard you are working! ---We are trying our best to reach our _________.
---Listen! What terrible noise! It_________ a ghost crying. --- yes .It really sounds_________.