“You can’t have your football back______you promise not to kick it at the window again!” the old lady said angrily.

--- Would you like to go shopping with me?--- I’d love to, ____ I can’t. I have many things to do.

—Do you like singing      dancing?—I like singing.

It’s dangerous______a tree．

People along the river didn’t allow them to ______ a factory so as not to pollute the water.