题目内容

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

A．to increase	B．to have increased
C．having increased	D．increasing

【答案】

【解析】

试题分析：原句意思是，由于沙漠化，近几年亚洲的沙尘暴在增长。不定式、现在分词都可以作表语，表示将来的含义时，一般用不定式。不定式的完成式表示的动作发生在谓语动词表示的动作之前，强调动作的先后顺序。所以选B。

考点：本题重点考查非谓语动词的用法。

点评：本题考查的是句子的意思确定出正确的非谓语动词形式，并使用正确的时态。

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