6. I wish I ______ longer this morning, but I had to go to school at 7 o’clock. (      )
A. could sleep                                           B. could have slept
C. slept                                                    D. have slept
7. Every adult ______ be responsible for what he or she has done.(      )
A. can                                                      B. could
C. should                                                  D may
8. If you favor ______on night shift, you may go and tell the manager. (      )
A. to work                                                B. working
C. having worked                                       D. being worked
9. The student confessed to ______a lie to the teacher. (      )
A. have told                                              B. having told
C. tell                                                      D. being told
10. I have no objection to ______ a trip to Hawaii again. (      )
A. have                                                    B. having
C. having had                                           D. have had