some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下

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some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下
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some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下
some of the experiments___in the book are easy to perform
A to be described B described C to describeD describing选哪个 逐项分析一下

some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下
B described
表示已经完成的被动
to be described表示将来的被动
to describe 表示将来的主动
describing 表示进行的主动
书上描述的一些实验是很好做的.
这里的实验已经被描述在书上了

Some of the some of 后加不加the some of the girls the names of some of the things the names of some of the things what are some of the some of the most是什么意思 pronounce some of the words the names of some of the thithe names of some of the things 翻译 some of the people 和 some people区别 some students 和 some of the student的区别 some words 和some of the words的区别 Some of the things some people,only to miss some drivers和some of the drivers的区别 we could give some of the reindeer some cookies. some of them steer by the position of the sun in some parts of the world. Some people call itthe language of