The conference has been to discuss the effects of tourism___the wildlife in the area.
In the last few years thousands of films ________ all over the world.
— Alvin,are you coming with us?—I'd love to,but something unexpected ________.
—I remember you were a talented pianist at college.Can you play the piano for me?—Sorry,I ________ the piano for years.(2012·湖南)
—Look!Somebody ________ the sofa.—Well,it wasn't me.I didn't do it.(2012·江西)
Daniel's family ________ their holiday in Huangshan this time next week.