1. —Did Alan enjoy seeing his old friends yesterday?
    —Yes, he did. He______ his old friends for a long time.
    A. didn't see
    B. wouldn't see
    C. hasn't seen
    D. hadn't seen
    2. — Jack bought a new mobile phone the other day.
    — ________? That’s his third one in just one month.
    A. Had he
    B. Did he
    C. Does he
    D. Has he
    3. Professor James will give us a lecture on the Western culture, but when and where ____ yet.
    A. hasn't been decided
    B. haven't decided
    C. isn't being decided
    D. aren't decided
    4. The play had already been on for quite some time when we ____ at the New Theatre.
    A. have arrived
    B. arrived
    C. had arrived
    D. arrive
    5. If Newton lived today, he would be surprise by what ____ in science and technology.
    A. had discovered
    B. had been discovered
    C. has discovered
    D. has been discovered
    【答案】DBABD