Be careful not to drop it; it's very ______.

—The hotel business in China is as __________ as that in developed countries now.—Yes, but we still have a long way on energy saving hotels.

It was pretty _______ from her voice that she was playing a trick on all of us.

He arrived at last, ______________.

Twenty years have passed, I am glad to find the local people in some undeveloped areas are _________ than they were before.