是假设还是事实

请看下面一道题：I had hoped to see her off at the station, but I _________ too busy.
A. was                 B. had been             C. would be              D. would have been
分析此题容易误选B或D，认为前句用了had hoped，所以此句谓语要用B或D与之呼应。正确答案为A：前一句谓语用had hoped，表示的是过去未曾实现的想法或打算，可以译为“本想”，而后一句说“我太忙”，这是陈述过去的一个事实，所以要用一般过去时。请看类  我太忙(答案均为A)：

(1) We had hoped to catch the 10:20 train, but _________ it was gone.
A. found              B. had found            C. would find              D. would have found

(2) We had hoped that you would be able to visit us, but you _________.
A. didn't               B. hadn't                  C. would not               D. would not been

(3) We had wanted to come to see him, but we _________ no time.
A. had             B. had had               C. would have          D. would have had

(4) I had expected to come over to see you last night, but someone _________ and I couldn't get away.
A. called          B. had called           C. would call            D. would have called