问题补充：
Had it been possible I would have gone to the movies, but I busy.
A. had been
B. am
C. was
D. would be
答案：
A. had been
B. am
(答案→)C. was
D. would be
解析：考查时态。本题较难。根据前半句中的would have gone可知是对过去所发生事情的虚拟，而But后面要使用陈述语气，故使用一般过去时。句意：如果可能，我就会看电影了。但是我太忙了。这里是指过去的时候，我太忙了。故C正确。
