–Why are you still here? It’s already seven o’clock.–Because I ______ my work. Don’t worry. It’s almost done.
—I have never been to the space museum. —______.
—Have you had a new apartment in 2014 ______? —Yes, I have ______ had one.
—Are Betty and Lingling still living in Beijing? —No, they ______ to Hong Kong.
—Was your school trip to the mountains _______? —Yes.We had a lot of fun.
—Which city has ______ population, Beijing, Shanghai or Tai’an? —Tai’an, of course.