I hope there ________ a robot in my home.
---Have you seen Dr. Adams recently? ---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
-- Has your sister come back? --Yes, she has. She______ back two days ago.
There __________great changes in our hometown in the past fifteen years.
-----________did your uncle leave his home town ? ----He ___________for nearly twenty years.
It's very to play chess with old friends at home.