【题目】The heat in the desert is ________; therefore there are few plants growing there.
A.hot
B.wide
C.serious
D.extreme

【答案】D
【解析】句意：沙漠里的热是极端的；因此几乎没有植物在那里生长。hot”热的“；wide”广泛的“；serious”严重的“；extreme”极度的“。故选D。