Look. How clean the window is! It ________ just now.A. was cleaned B. is cleaned . has been cleaned D. will be cleaned
---What should we do next? --- The first thing is ________ a hotel ________.
Don't make your children ________ for hours reading books in ________ a dark room.
She_______her little sister every morning after she gets up..
------Your grandpa had a bad cold last week. ------_____________.
What ________ if there ______ no water or air on the earth?