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It is necessary to make your decision____everybody,___.

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It is necessary to make your decision____everybody,___.
A.known;in my opinion B.know;I think
C.known by ;I believe D.known for ; in his opinion
-what are you mailing,Ryan?
-A textbook___a new method of teaching physics.I want my friends to take a look at it.
A.is based on B.based on
C.basing upon D.which based upon
怎么区分base on 和 be based on?
It was very polite _____ him to give his seat on the bus to the old man.
A for B of
选B 为什么A不行?
1、make sb known 就是“使……知道”的意思,MAKE SB DONE表示被动(令某人……)
2、based on在这里就是以过去分词作为定语,相当于定语从句“A textbook which/that is based on a new……”省略“WHITCH IS”,修饰TEXTBOOK,BE BASED ON是单独用的.
3、It is……of sb,当中加形容词,是惯用用法,表示“某人很……”.
be polite of him 意思是他很礼貌.
例如 it is kind of you,意思是“你很好”.