A red light will start continuously flashing when the batteries____ low.


  1. A.
    get
  2. B.
    will get
  3. C.
    are getting
  4. D.
    got
C
考查時態(tài)。本題是現(xiàn)在進(jìn)行時表示將來時，句意：在電池電量就要變低的時候，紅燈會開始閃爍。Are getting low就要變低。
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