_______ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
A．Being separatedB．Having separated
C．Having been separatedD．To be separated
C

試題分析：通過分析句子結(jié)構(gòu)，這里需要用現(xiàn)在分詞作原因狀語，現(xiàn)在分詞的動(dòng)作發(fā)生在謂語動(dòng)作之前，故用現(xiàn)在分詞的完成時(shí)；并且現(xiàn)在分詞的邏輯主語“Australia”與分詞動(dòng)作“separate”之間是被動(dòng)關(guān)系，故用現(xiàn)在分詞的完成時(shí)的被動(dòng)式。
點(diǎn)評：非謂語動(dòng)詞是英語中的重點(diǎn)語法項(xiàng)目之一，它涉及詞法、句法、時(shí)態(tài)、語態(tài)和各種習(xí)慣用法，易混點(diǎn)比較多，在句中的位置靈活，且句法功能較多。所以學(xué)習(xí)非謂語動(dòng)詞時(shí)應(yīng)理清非謂語動(dòng)詞在句中所作的成分及它們之間的區(qū)別。
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