Coffee is said to have_____ effects.

It seems quite _____ to expect a student to master 3,000 words within only 5 days.

With films like Avatar proving__________ in cinemas, many technology experts believe 3D is now set to take over the home market,

While there are some differences in the education systems in many countries in the world, education is __________.

—Why are you laughing secretly at me?—You look         in that odd hat.