#[50] In this restaurant,beer ______ for free as long as costumers spend more than 100 yuan in it.A.servesB.has servedC.is servedD.had been served请帮忙翻译包括选项,并分析.

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#[50] In this restaurant,beer ______ for free as long as costumers spend more than 100 yuan in it.A.servesB.has servedC.is servedD.had been served请帮忙翻译包括选项,并分析.
#[50] In this restaurant,beer ______ for free as long as costumers spend more than 100 yuan in it.
A.serves
B.has served
C.is served
D.had been served
请帮忙翻译包括选项,并分析.

#[50] In this restaurant,beer ______ for free as long as costumers spend more than 100 yuan in it.A.servesB.has servedC.is servedD.had been served请帮忙翻译包括选项,并分析.
你如果选A,那么SERVE的主语就是BEER了,啤酒显然是被提供的,所以不对.
B自然也就不对了,显然该是被动语态.
至于C和D,都是被动语态,但是这因为说这个酒店只要花了一百元就可以免费提供啤酒,所以是一直在进行的一个描述事实常态的,所以就不用过去完成被动式了.

在这家餐馆,只要顾客消费100元以上,就可以免费饮用啤酒。
一般现在时,因为是餐馆的经常性动作,而被动语态,所以选C

在这家餐馆,当顾客消费100元以上,啤酒就可以免费供应。
一般现在时,啤酒作主语,被动语态,所以选C