_______is no good always complaining about life. At least, we are living.

Mobile phones have made       possible for us to reach out to the farthest corners of the world from our homes. 

I’d appreciate _______ if you would teach me how to use the computer.

Understanding the cultural habits of another nation，especially ________containing as many different cultures as America，is a difficult thing.

_______ interested in the position are asked to see the manager tomorrow.