问题补充：
I’d like to join the school volunteer project, but I’m not sure .
A. what I should do
B. what should I do
C. how I should do
D. how should I do
答案：
(答案→)A. what I should do
B. what should I do
C. how I should do
D. how should I do
解析：英语宾语从句中一般为陈述语序。How引导宾语从句表示方式方法，做状语。What引导宾语从句充当主语，宾语，表语。句意：我想加入学校志愿者工程，但是我不确定我应该做什么。故选A。
