问题补充：
I do not know what I without the suitcase you lent me.
Glad to have been of some help to you.
A. would have done
B. would do
C. should have done
D. should do
答案：
(答案→)A. would have done
B. would do
C. should have done
D. should do
解析：通过without the suitcase you lent me的提示可知此题考察虚拟语气，又根据句意可知是对过去的虚拟，但是should have done意思是“本应该”，所以答案A。
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