Choose the best answer

1)  I wish he _______ more time now to help you with your lesson

            A. have                       B. had                         C. would have           D. had had

2)    I wish I _______ psychology when I was a college student.

            A. had studied           B. would study          C. studied                  D. study

3)  If only I _______ play the guitar as well as you.

            A. would                    B. should                   C. could                     D. might

4) I wish I _______ my letter of application earlier.

            A. wrote                     B. had written           C. could write           D. should write