They ______ many horrible crimes against the American people since a few years ago。


  1. A.
    have committed
  2. B.
    committed
  3. C.
    have made
  4. D.
    made
A
這題考查時態(tài)，時間狀語是since引導(dǎo)的，所以用現(xiàn)在完成時，句意是：自從幾年前他們一直對美國人民犯下可怕的罪行。所以用現(xiàn)在完成時，選A。
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