Question

I ________ show you around this beautiful school, for it is my duty, but I’m not sure whether I will have time this Sunday．

1. A.
   should
2. B.
   might
3. C.
   would
4. D.
   could

Answer 1

A
解析：
本题考查情态动词，所给选项均为过去时态，但本句意义却非在此。句子意思是：我本应该带你参观学校，但不一定有时间。满足这一意义的只有A项should，表示应该。