几道英语选择题...1.I can't say which wine is best.--it's a(n) ____

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几道英语选择题...
1.I can't say which wine is best.--it's a(n) ____ of personaltaste.
A.affair B.event C.matter D.variety
2.The country has already sent up three unmanned spacecraft,the most recent _____ at the end of last March.
A.has been launched B.having been launched
C.being launched D.to be launched
最好说一下理由,..

两个都是C.
A matter of personal taste的意思是,这是个人品味问题.
第二个里,后半句考独立主格结构,逻辑主语为the most recent .所以A是肯定不可以的,因为这是用在完整句中里的形式,显然这里要用非谓语形式.再看时间状语是at the end of last march 这显然是个过去的时间,所以D是不可以的,因为to do 往往表示的是将来.B,C之间显然要选c,因为这个时间状语带有很明显的过去时,相比之下不用完成式

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