Could you please give me ________? 

The two cities have reached an        to develop science and technology.

—What can we do to prevent (避免)being ill?—We should do more exercise and eat a ________ diet to take good care of ______.

 One of the world’s first ____ was in Egypt.

If you want to be healthier, you shouldn't do _____ in the classroom all the        time but do more _____ on the playground.