优优班--学霸训练营 > 知识点挑题
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            • 1． It is generally considered unwise to give a child         he or she wants.
              A．however      
              B．whatever    
              C．whichever     
              D．whenever 
              难度：中等
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            • 2． The nutrients in ________ falls into the ocean quickly become available to other living things.
                   A. what       B. that    C. whatever   D. which
              难度：中等
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            • 3． Someone is ringing the doorbell. Go and see ___________.
                  A. who is he        B. who he is        C. who is it        D. who it is
              难度：中等
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