Even with the guide leading the way，they_______to cross the thick forest.

A.didn’t dare                B.dare not                    C.dared not                   D.not dared

– Did Alan enjoy seeing his old friend yesterday?

   -- Yes, he did. He ______ his old friend for a long time.

   A. didn’t see     B. hadn’t seen     C. hasn’t seen      D. wouldn’t see

7. Not until I began to work ________ how much time I had wasted.

A. didn’t I realize      B. did I realize   C. I didn’t realize            D. I realize

 Edward, you play so well. But I ______ you played the piano.

A. didn’t know                B. hadn’t known

C. don’t know                 D. haven’t known

-- I didn’t go to Mary’s party last night because my car broke down.

   ---You could have borrowed mine. I ____ it.