Sandstorms in Asia seem _____ in recent years as a result of desertification.


  1. A.
    to increase
  2. B.
    to have increased
  3. C.
    having increased
  4. D.
    increasing
B
試題分析：原句意思是，由于沙漠化，近幾年亞洲的沙塵暴在增長。不定式、現(xiàn)在分詞都可以作表語，表示將來的含義時(shí)，一般用不定式。不定式的完成式表示的動作發(fā)生在謂語動詞表示的動作之前，強(qiáng)調(diào)動作的先后順序。所以選B。
考點(diǎn)：本題重點(diǎn)考查非謂語動詞的用法。
點(diǎn)評：本題考查的是句子的意思確定出正確的非謂語動詞形式，并使用正確的時(shí)態(tài)。
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