【题目】The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.
A. / B. this C. that D. it
在线课程【答案】D
【解析】
试题分析：考查It用法。本句中的It是形式宾语，真正的宾语是后面的不定式短语to rescue the people trapped under the ruins in the earthquake.句意：大火让从地震废墟中救出被围困的人非常困难，故D正确。