单项选择题
A．they see different things B．they cannot agree about things C．some have better eye-sights D．none of these
A．People walled their yards with fences. B．The settlers in early years needed their neighbors’ help very much. C．People get used to American openness. D．It is difficult to follow the American way of lif
A．asking native speakers for explanations B．reading good books in the foreign language C．comparing their speech with that of native speakers D．speaking without regard to native speakers