-Have you read this book?-Yes.I _______ it two weeks ago.
—Why not get your mother a scarf for her birthday? —_______
---Do you know___________ in Ya’an? --- On the 20th of April,2013.
Does Miss White like sports? —Yes, __________ favorite sport is tennis.
Sally took a photo of her friends while they_____computer games.
–There is thick haze(雾霾)around many cities in China recently. What do you think of it ? ---I think __________ cars we drive, the less pollution the city has.