问题补充:
Jim a skilled worker for almost six years. He is an experienced manager now.
A. has been
B. had been
C. is
D. was
答案:
A. has been
B. had been
C. is
(答案→)D. was
解析:句意为:Jim是一个技术工人近六年了,现在成了一个很有经验的经理。has done现在完成时,过去发生的动作一直持续到现在。由后面的现在是一个很有经验的经理可知不符合题意;had been 过去完成时,发生在过去的动作之前的动作,句中没有过去的动作或时间为参照,故不符合题意。一般现在时表示经常性,习惯性的动作,而是一个技术工人应在过去,现在是经理,由此可知现在时不符合题意。