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I didn't understand ________, so I raised my hand to ask.


  1. A.
    what my teacher says
  2. B.
    what does my teacher say
  3. C.
    what my teacher said
  4. D.
    what did my teacher say
C
考查賓語(yǔ)從句的用法。賓語(yǔ)從句用陳述語(yǔ)序，由此可排除選項(xiàng)B、D。主句用的是一般過(guò)去時(shí)態(tài)，從句要用相應(yīng)的過(guò)去時(shí)態(tài)。故選C。
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