ime _____ sitting at a desk, office workers are generally troubled by health problems.

You can be anything you want to be. Don’t always yourself with others.

I’m expecting for long to have a drone(无人机)to take photos, but my parents refuse to buy _______for me.

____ with the size of the whole earth, thehighest mountain doesn’t seem high at all.

on the top of the mountain is an ancient tower dating back to hundreds of years ago .