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— Wasn't it Dr Wang who spoke to you just now?

   — ____.      

A. I didn't know he was      B. Yes， it was      C. No， he wasn't    D. Yes， he did

The meal didn’t cost much, _____ very good.

This summer North China was attacked by such a terrible heat ????????? ? few people has ever experienced before.

A.that????????????? B.and it was????????????? C.which????????????? D.as

When asked to explain _____ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.

A．what was it that     B．that what it was     C．what it was that     D．what was it

1 didn't know ______ they got to know each other．

    A．where was it                         B．where it was                  

    C．where was it that                       D．where it was that