China’s Beidou global satellite navigation system will have been completed by 2020, ____ of more than 30 satellites.
A．consistingB．consistedC．to consistD．consists
A

試題分析：考察分詞做定語。當(dāng)分詞做定語的時候，如果動詞與名詞構(gòu)成主動關(guān)系，就使用現(xiàn)在分詞做定語。如果動詞和名詞構(gòu)成被動關(guān)系就使用過去分詞做定語。句意：中國的北斗全球定位系統(tǒng)將會在2020年之前完成，這個系統(tǒng)由30多顆衛(wèi)星組成。動詞consist of與前面的名詞構(gòu)成主動關(guān)系，故使用現(xiàn)在分詞的形式。故A正確。
點評：當(dāng)分詞做定語的時候，如果構(gòu)成分詞的動詞與名詞構(gòu)成主動關(guān)系，就使用現(xiàn)在分詞做定語；當(dāng)二者構(gòu)成被動關(guān)系，使用過去分詞做定語。單獨的一個分詞做定語要放在名詞的前面，分詞短語做定語要放在分詞的后面。
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