7．Regular public broadcasting followed shortly afterwards，first ________ on 11May 1928 in New York and on 20August 1929in London．（　�。�
A．beganB．to beginC．beginningD．begun

分析 之后不久定期向公眾播放的廣播就開始了，首先是1928年5月11日在紐約開播，然后是1929年8月20日在倫敦開播．

解答 答案是C．本題考查分詞作狀語(yǔ)；題干中已經(jīng)有謂語(yǔ)動(dòng)詞followed，所以空格處需要的是非謂語(yǔ)動(dòng)詞，做伴隨狀語(yǔ)；begin和句子主語(yǔ)broadcasting之間構(gòu)成主謂關(guān)系，故用現(xiàn)在分詞，答案選C．

點(diǎn)評(píng) 首先判斷選項(xiàng)中的動(dòng)詞在句中是以謂語(yǔ)還是非謂語(yǔ)形式出現(xiàn)，然后根據(jù)選項(xiàng)在句中的功能結(jié)合非謂語(yǔ)的基本用法做出合理的判斷．

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