How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项 ,why

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How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项 ,why
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How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项 ,why
How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项 ,why

How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项 ,why
正确答案：
C.at 20% off.
如选择B,则后面要跟价格,如：for $20.
A是不可取的,只是搭配的问题.
除定冠词之外,英语的介词是最难学的,只能根据习惯用法强击,到时就熟能生巧了.往往没有“why”可言.

Is this chair on sale for only 15 yuan?
这把椅子在低价销售只卖15元吗？
on sale for接多少钱，指以什么价格出售。

B

much how is dress this How much is this computer?[同义句] this skirt is how much（?） how much is this sum?kuai How much is this T-shirt?中文翻译 How much is this belt?怎么回答? How much is it/this/ that? how much this is red shirt改错 It is amazing how much this helped How much is this computer?---the --- --- this computer? how much are this pair of shoes?还是how much is this pair of shoes? How much is this coat?的同义句是How much ____ this coat ____? how much is this shirt?同义句 how much ()this shirt()? how much is this shirt?改为同义句how much( ) this shirt( ） This is pen.how much is the pen ------is this big A; how much B;how many C;how far D; how tall How much for this? 【连词成句】1.is,sweater,how,much,this,long 2.shorts,are,how,much,these