根据句意及首字母提示补全短文

    W do we do if we have something to tell others or if we want to learn something f others? Yes, we use our l , that is, either spoken language or written language. But actually(实际上), there is another k of language and it is also very important. Do you' know what it is? Yes, that is the b language. Can you tell me something a body language? For example, if you agree with what I said' just now, what do you do? And if you don't agree w what I said, what do you do? But s the same gesture means different things in different countries. For, example, s in the world nodding, head doesn't mean YES. So if you visit a foreign country, only speaking its language very well isn't e .