问题
选择题
Li Lei realized necessary for him to get up early to do some exercise for he found he was getting fatter and fatter..
A．one
B．that
C．it
D．this
答案
答案：C
题目分析：句意：李雷意识到对于他来说早起锻炼是很有必要的，因为他发现他正变得越来越胖。it做形式宾语，真正宾语是 to get up early to do some exercise早起锻炼，故选C.