For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development．

For some time now, world leaders ________ out the necessity for agreement on climate change, the world economy and African development．

1. A.
   had been pointing
2. B.
   have been pointing
3. C.
   were pointing
4. D.
   pointed

. For some time now , world leaders ______ out the necessity for agreement on climate change , the world economy and African development .

  A. had been pointing    B. were pointing  C. have been pointing  D. pointed

For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development．

       A．had been pointing           B．have been pointing

       C．were pointing         D．pointed

For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development．