________that I could use a special piece of cloth to attract people's attention, I decided to do an experiment.
A．Having realizedB．Realizing
C．Being realizedD．Realized
A

試題分析：考查分詞做狀語。分詞做狀語的時(shí)候，任何動(dòng)詞與句子的主語構(gòu)成主動(dòng)關(guān)系，則使用現(xiàn)在分詞的形式；如果二者構(gòu)成被動(dòng)關(guān)系，使用過去分詞的形式。句意：意識到我可以使用一塊特別的布來吸引人們的注意力，我決定做一個(gè)實(shí)驗(yàn)。意識到。。。是一個(gè)在謂語動(dòng)詞之前就發(fā)生的事情，故使用現(xiàn)在分詞的完成式。故A正確。
點(diǎn)評：分詞做狀語的時(shí)候，任何動(dòng)詞與句子的主語構(gòu)成主動(dòng)關(guān)系，則使用現(xiàn)在分詞的形式；如果二者構(gòu)成被動(dòng)關(guān)系，使用過去分詞的形式。
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