(届四川成都高三摸底试卷)The Mekong River Commission has found no evidence ______ the dams on the upper reaches have an influence on the water flow downstream.
---Was it under the tree ____ you were away talking to a friend? --- Sure. But when I got back there, the bike was gone.
We must stop pollution _____ longer.
Who would you rather _____ the report instead of you?
I'm busy now. I'm sorry I can't help ____ the flowers.
In New Zealand, I made lots of friends ___ a very practical knowledge of the English language.