Question

【題目】The higher the ground is, the ________ (thin) the air becomes.

Answer 1

【答案】thinner

【解析】

句意：離地面越高,空氣就越稀薄。分析句子結構可知此處是the＋比較級……,the＋比較級……意為"越……,就越……"。故填thinner。