We want to know to help them.A. what can we doB. whatwecan doC. how can we doD. how we can

问题补充：

We want to know to help them.

A. what can we do

B. whatwecan do

C. how can we do

D. how we can do

答案：

A. what can we do

(答案→)B. whatwecan do

C. how can we do

D. how we can do

解析：考查宾语从句。宾语从句要用陈述语序，排除A和C。句意：我们想做点什么来帮助他们，故选B。