I asked her whether she had done all the work herself ________ whether she had had asked sb. for help.
A．a(chǎn)ndB．butC．norD．or
D  
      題意：我問她是她自己做完了所有的工作還是找別人幫忙了。只有or才能表示選擇，意為“(是……) 還是”。
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