6. I passed the exam with luck, but it was a long time ______ I told my friends about it.
 A. before                                                   B. since
 C. after                                                     D. as
7. It ______ until dusk that he realized that it was too late to return home.
 A. was                                                      B. wasn’t
 C. weren’t                                                 D. were
8. Do you remember ______ Tom about this before?
 A. to tell                                                   B. to have told
 C. telling                                                   D. tell
9. I don’t mind _______ by bus, but I hate standing in queues.
 A. to travel                                                B. traveled
 C. traveling                                               D. having traveled
10. Look, ______.
 A. there he goes                                         B. there goes he
 C. he goes there                                         D. he there goes