-----Did Alan enjoy seeing his old friends yesterday?

----- Yes, he did. He _____ his old friends for a long time.

A．hadn’t seen                          B．didn’t see

C．hasn’t seen                           D．wouldn’t see

He __________ his aunt’s when he went to Wuhan on business.

A. called on        B. called at         C. dropped in on     D. dropped in

He ______ his cartoon books to read but didn’t _______ one at last, so he asked his mother for help.

1. A.
   looked for; found
2. B.
   looked for; find
3. C.
   found; look for
4. D.
   find; look for

Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.

A．had left           B．would leave        C．was leaving        D．has left

 -- Do you think Allan came by taxi?

-- No. If he had, I don't believe he ______ his bike here.