19．People realize that the new development in technology can and _____ marketing activities．（　�。�
A．will have affectedB．was affecting
C．did affectD．does affect

分析 人們意識到這種技術(shù)的新發(fā)展確實可以影響市場推廣．

解答 答案：D 句意表達的是一般事實，要用一般現(xiàn)在時態(tài)；在謂語動詞前加does是對謂語動詞的強調(diào)．故選D．

點評 對謂語動詞進行強調(diào)時，直接在謂語動詞前加do，did，does即可．

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