试题与答案

He is very surprised that all the houses

题型:选择题

题目:

He is very surprised that all the houses in the village ______ white.

A.paint

B.painted

C.are painting

D.are painted

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:水由氢元素和氧元素组成,每个水分子由两个氢原子和一个氧原子构成。选A。点评:本题难度不大,水是纯净物,由氢元素和氧元素组成。

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