新概念3册55课For most of the earth's history they have been the only form of life on our planet.应该是过去完成时才对吧?因为是细菌作为the only form of life的这个状态已经不存在了啊,还有they是不是应该改为it呢

新概念3册55课For most of the earth's history they have been the only form of life on our planet.应该是过去完成时才对吧?因为是细菌作为the only form of life的这个状态已经不存在了啊,还有they是不是应该改为it呢 看到几个新概念的句子,英语中的chocolate到底何时用单数何时用复数?如题这是几个在新概念第15课中的句子1.For most of them,fifty pence is a small price to pay for a nice big bar of chocolate.2.George was not too ups 新概念第三册第九课中问题one of the things that fascinates us most about.中fascinates是否应改为fascinate 新概念英语3里面的小问题30课 幽灵之死那课哩的.In time,it became an accepted fact that the Cox brothers employed a conscientious ghost that did most of their work for them .(为什么用accepted,而不用acceptable.不是有形容 For ten of my most important friend for most of history 什么意思? 新概念3 第9课 flying cats one of the things that fascinates us most about cats is the popular belief that they have nine lives.为什么用的是fascinates? As it did case of Alex who worked as a dustman for the E corporation .work 过去式是因为过去时态的原因么?新概念3 第四课 for most 新概念英语第三册 12课 一句话语法提问Most of us have formed an unrealistic picture of life on a desert island.We sometimes imagine a desert island to be a sort of paradise where the sun always shines……The other side of the picture People use most of the land for ___(farm,farming) this isn't very interesting for most of us.翻译 for most of the kids ,the weekends was fun .改错 I take For the most part of the voyage意思 Most of us grow up taking certain for granted. Most of the i____ are good for crops. For most of us,Success in school has Very little 比如我在新概念三册中14课文章开头：children always appreciate small gifts of money ,Mum and dad,of course,provide a regular supply of pocket money,but uncles and aunts are always a soure of extra income.For most of them,fifty pence is