—Were you at Mary’s party last night?—No, I ____________ my sister. She met with difficult problems.
We should have our students ________ hard instead of ________ too much time playing games.
My father bought a new bike for me yesterday. It’s a structure of__________.
---I plan to go to a movie. Would you like to go with me? ---_____. That’s my favourite.
After a short rest, the workers kept on _____ till midnight.
___of giant pandas is getting ___because their living areas are becoming farmland.