If water becomes increasingly scarce in decades ________，water shortage will become a hot issue all over the world.

---How do you respond when ________ whether your girlfriend or wife looks fat? --- Never say what you think. She just wants some reassurance(肯定) from you that she’s attractive.

I was almost _______ to death at the sight of the ________ scene.

In some cities the traffic police use computers to keep the traffic________smoothly.

He told me that the music was ______ worth _______ again.