If I _were_ not so busy , I should go with you . A. were B. was C. is D. are 选A如果我不忙,我会跟你一起去.这个是虚拟语气.实际情况是,我很忙.文字上说,如果我不忙,我.这种情况下,一律用过去时复数比如：If he...