_____by a greater demand for vegetables, farmers have built more green houses.A．
题型：不详难度：来源：
_____by a greater demand for vegetables, farmers have built more green houses.| A．Driven | B．Being driven | C．to drive | D．Having driven |
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答案
| A |
解析
试题分析：考查分词做状语用法。分词做状语，要求分词的逻辑主语必须的句子的主语。本题farmers与drive构成被动关系，故使用过去分词的形式。排除CD。B项表示正在进行。与句意不符。句意：被大量的蔬菜需求所驱赶，农民们已经建了更多的大棚。故A正确。
点评：分词做状语时，要构成动词与句子主语的关系来决定其形式。构成主动关系，使用现在分词；构成被动关系，使用过去分词的形式。 |
举一反三
| Peter was so excited _________ he received an invitation from his friend to visit Chongqing. |
________, it began to rain unexpectedly.| A．While cleaning the machine | | B．To clean the machine | | C．He was cleaning the machine | | D．While he was cleaning the machine |
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While____the dog,you should take care not to____.Otherwise,it may be dangerous to strangers.| A．walking; get loose | B．walk; be loose | | C．walking for; get it loose | D．training; get it run |
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you talk to someone or write a message，you show your skills to others.| A．At times | B．Some time | C．Every time | D．The time |
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—Will the match be cancelled because of the bad weather?
—No, rain or shine, the match will be held as .| A．schedule | B．scheduling | C．scheduled | D．to schedule |
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