—You don’t look well! What’s the matter?—My son is _______ to computer games. And I have no idea what to do with it.

If you tend to regularly suffer from a certain symptom like headache, be sure to keep in store the       medicine to take care of the issue as soon as it starts.

Smile is recognized as a/an _________ language, which can be understood by people all over     the world.

He was watching her doing it with a _________ look on his face, as if to say that he would not change his mind.

—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.