27、It's natural that a house made of wood or bamboo may stay up in an earthquake while it's easier for __________ made of steel and concrete to fall down sometimes．
A．one B．that C．it D．what
科目：高中英語 來源： 題型：
It's natural that a house made of wood or bamboo may stay up in an earthquake while it's easier for __________ made of steel and concrete to fall down sometimes．
A．one B．that C．it D．what
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