Many gases        in the atmosphere actually        heat energy that escapes from the Earth’s surface back to the earth.
A．finding; reflectingB．found; reflected
C．found; to reflectD．found; reflect
D
考察非謂語動(dòng)詞。過去分詞做定語表示被動(dòng)的，發(fā)生過的動(dòng)作。句意：在空氣中許多被發(fā)現(xiàn)的氣體實(shí)際上反映了從地球表面擴(kuò)散又回到地球的熱能。前文動(dòng)詞為gases的定語，發(fā)生過的用過去分詞，下文從此為句子謂語。敘述一個(gè)客觀存在的事實(shí)，用一般現(xiàn)在時(shí)態(tài)，gases為復(fù)數(shù)，故動(dòng)詞用原形，選D。
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