Question

I’m most awfully grateful to you. I can’t think what I ________ without you

1. A.
   could do
2. B.
   would do
3. C.
   should have done
4. D.
   must have done

Answer 1

C
解析：
考查情态动词。句意：我非常的感激你，我认为没有你我本不应该完成的。should have done 本应该做某事而事实上没有做，shouldn’t have done 本不应该做某事而实际上做了。所以选C。