As some of the rules concerning foreign trade run contrary to the principles of the W

The old concerns lose importance and some of them vanish altogether.A．developB．disappearC．

The ______of the world ’s forests concerns e veryone in some way.A. destructionB. cons

We have the same problem as you concerning the learning of English.

Chomsky defines "competence" as the ideal users______ of the rules of his language.A．insti

Today concern for the environment extends into such areas as chemical pollution of the air

Some entrepreneurs from the technology industry share the same concerns about AI as the academic community. ()