题目
The diamond is a solid and the air is a (fluid).选择能代替括号里的选项
A、gas
B、liquid
C、current
D、atmosphere
第1题
A.Hard although the diamond is
B.Hard as the diamond is
C.As the diamond is hard
D.How hard is the diamond
第2题
A.Hard a diamond is
B.Hard as a diamond is
C.As a diamond is hard
D.How hard is a diamond
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