1. The rock ______wears away due to the action of the water.
A. Gradually B. exactly C. loosely D. fluently
2. He is a _______visitor to that country .I mean, he often goes there .
A. grateful B. loose C. frequent D. native
3. So fluently does he speak English that he is often considered as a (an ) _____.
A .official B. teenager C .native D .accent
