With the development of the central and western China，more and more modem cities have ——in what was a wasteland ten years ago

. Will you see to _______ that the luggageis brought back as soon as possible

The word “nut” has “n” and “u” in it .

It took ______ building supplies to construct these energy-saving houses. It took brains, too.

It’s so cold! Why not close the door? —SorryIt _________I’ll have it repaired soon