The main idea of the first paragraph is . Plants with roots appeared about .million years ago.

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问题 The main idea of the first paragraph is ______.
Plants with roots appeared about ______.million years ago.

选项 A、430
B、300
C、330
D、100

答案C

解析最先出现的植物在4亿3千万年前，1亿年后，植物开始生根，也就是3亿3千万年前。

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公共英语二级笔试

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The main idea of the first paragraph is . Plants with roots appeared about .million years ago.

公共英语二级笔试

公共英语（PETS）

Impressionismbeganwithasmallgroupofartistswhowantedto__.Mostpeopledidnotlikeimpressionisticpainting_

Anthropologistsusuallystudysimple,unindustrializedsocietiesbecausethenumberof______islimited.

Accordingtothepassage,whenpeopledonotunderstandeachother’slanguage,theycantalkwiththehelpof______.Thewaite

Theconceptofpersonalchoiceconcerninghealthisimportantbecause______.Toknowinglyallowoneselftopursueunhealthyha

Mrs.Kellercoulddoallhouseworkbecause.madetheoldwomannotanswerthetelephone.

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AnoldladylivedinavillagewentmtownoneSaturday,andafter【S1】______shehadboughtsomefruitandv

"Howfarisittothenextvillage?"theAmericanasksamansittingbythesideoftheroad.Insomecountries,becausetheman

InsomefarawayTurkishvillageofKuskoy,whistlingisasimportantastalking.Infact,whistlingistalkingbecausethevilla

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