Numbers of terrorists attacks in the pastfew years have signaled that anti-terrorism remains _____ long term goalfor______ world.

My brother’s plans are very ________: he wants to master English, French and Spanish before he is sixteen. [ ]

Math is useful, so it’s _______ for us to learn it well.

I want to buy that kind of cloth because I _____ the cloth _____ well

Who did your English teacher the exercise books?