This river has changed its course many times. It always located where it at present.
A. isn’t; is
B. isn’t; will be
C. wasn’t; is
D. wasn’t; has been
网友回答
A. isn’t; is
B. isn’t; will be
(答案→)C. wasn’t; is
D. wasn’t; has been
解析：考查时态。句意：这条河改道了很多次。它不是一直都在现在这个位置的。因为是过去不在，所以用wasn’t ，后者强调的是原先已经坐落的地方，故用完成时has been。