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1.___the efforts of all colleagues,the project has got great

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1.___the efforts of all colleagues,the project has got great success.A.Depending upon B.depend on
c.having depended on D.to denpend on
选择哪个,为什么?
2.the decline in gross profit was __the dropping prices of chemical product.
A.due to B.Because C.for D.as
选哪个?为什么
四个选项有何区别.
1.___the efforts of all colleagues,the project has got great
第一题选a,逗号前的部分为非谓语部分,所以b排除,d中to do一般表目,排除,c一般需要特定的时间先后关系,也就是明确说明该动作发生在主句动作之前.
第二题选a,bcd三个词均后均接句子,为连词,a答案后接非谓语或名词.
再问: c一般需要特定的时间先后关系,能否举例说明?
再答: 不需要啊,它就是由于和因为的意思,和owing to意思相同且用法一样,例:I love the food due to its taste. 望采纳喔!
再问: 我问的是第一题
再答: Having eaten breakfast,he went to school.吃早餐在上学之前,所以一般这样用。发生在过去时间之前,非谓语部分用完成时。