问题
选择题
If it had been possible, I would have helped him, but I ______ too busy.
A．had been
B．would be
C．were
D．was
答案
答案：D
题目分析：句意：如果可能的话，我肯定会帮助你的，但是我太忙了。对过去的虚拟If+主语+had +动词过去分词,主语+would / should / might / could have + 动词过去分词。所以描述的是过去的事情，故我过去很忙应该用过去时。