问题补充：
I would like to join the school volunteer project, and I often imagine .
A. what I should do it
B. what should I do
C. what I should do
D. how should I do
答案：
A. what I should do it
B. what should I do
(答案→)C. what I should do
D. how should I do
解析：我想加入学校的志愿者活动，去经常想象我应该做什么。宾语从句的结构：主语+谓语+连接词+从句。从句在句中作宾语。从句要用陈述句的语序。如果主句是一般现在时，从句根据需要选择时态，如果主句是过去时态，从句要用相应的过去时态。A有做的内容，故连接词错误，BD语序错误，故选C。
