-Ten minutes ago, there __________ an eraser, a pen and some books on the desk.But now there __________ anything on it. -Don't worry. Maybe someone put them away. A. was, isn't B. were, isn't C. is, wasn't D was, wasn't
-When __________ Mr. Green __________ to Australia? -He traveled to Australia two years ago. A. did, travel B. did, traveled C. was, travel D was, traveled