Ⅰ.词义辨析
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(n) ________.
A．official B．teenager C．native D．accent
