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 |
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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 |
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