【题目】The use of computers has made ______ possible for more people to work at home.
A.it
B.that
C.which
D.what

【答案】A
【解析】本题考查代词，it 在此作形式宾语，真正的宾语是后面的不定式to work athome，有些可以加宾补的动词，如make,consider, keep, think of 如果宾语太长，常常借助于代词it 使其作形式宾语，而将真正的宾语放在后面。