Over the past half century, ___ chemical fertilizers has become very common in farming. A. having used B. use C. used D. using 相关知识点: 试题来源: 解析 D 【详解】试题分析:句意:在过去的半个世纪,在农业中使用化肥已经很普遍。此处是作主语,故用动词-ing形式,故选D。 考点:考查非谓语动词...
Over the past half century,___(use) chemical fertilizers___(become) very common in farming. 解析:第一空考查动名词作主语;第二空考查主谓一致和时态,动名词作主语时谓语用单数,根据“over the past half century”可知用现在完成时态。 相关知识点: 试题来源: 解析 using has become 解析:第一空考查...
通读全文,根据第一段“Over the past half-century, scientists have settled on two reasonable theories related to baby talk. One states that a young child’s brain needs time to master language. The second theory states that a child’s vocabulary level is the key factor.”( 在过去的半个世纪...
Over the past half century, using chemical fertilizers has become(become) very common in farming. 相关知识点: 试题来源: 解析 答案:has become.考查单词填空.根据句意和汉语提示可知这里使用动名词作主语,谓语用三单,时间是Over the past half century,和现在完成时搭配. 在过去的半个世纪里,使用化肥在...
Over the past half-century, North America has lost more than a quarter of its entire bird population, or around 3 billion birds. “We saw this great net loss across the entire bird community,” says Ken Rosenberg, a scientist in Ithaca, N.Y. “But we also knew that other bird populati...
由Over the past half century时间状语可知,该句应为现在完成时,结合主语using chemical fertilizers为动名词作主语,谓语动词应为单数形式。故填has become。 (2)题详解: 考查代词。句意:许多农民欢迎它们,认为这是防止作物病害和提高产量的好方法。分析句子可知,此处指代前文出现的复数名词“chemical fertilizers”,...
【题目】课文语法填空Over the past half century, it has become very commonfor farmers to use chemical fertilizers in farming. It's a greatway to stop crop disease and increase 1.(produce). Recently, however, scientists 2.(find) that long-term use of these fertilizers can causedamage to ...
61.has become,考查时态,Over the past half century和现在完成时态连用.62.a ,考查冠词,泛指一种方法,所以用不定冠词.63.hoping,考查现在分词,hope和句子主语之间是主动关系,所以用现在分词作状语.64.them ,考查人称代词,指代前面的chemicals,所以用them作宾语.65.harmful,考查形容词,作定语修饰名词,所以用形容...
the Year,thatover the past half centuryhuman activity has caused an unprecedented decline in biological diversity. daccess-ods.un.org daccess-ods.un.org 秘书 长在今年早些时候的一封信中指出,在过去半世纪中,人类活动造成生物多样性以空前速度衰减。
Over the past half century,using___ (化学的) fertilizers has become very common in farming. 相关知识点: 试题来源: 解析 答案:chemical考查形容词.根据所给的汉语提示"化学的"和空后的名词fertilizers可知,此处应用形容词修饰名词,"化学的"的英语是chemical,故填chemical. 在过去的半个世纪里,使用化肥...