题干
These animals are in danger．We should think ______ to protect them．
A：how we can do
B：how can we do
C：what we can do
D：what can we do
答案(点此获取答案解析）
C
These animals are in danger．We should think ______ to protect them．
A：how we can do
B：how can we do
C：what we can do
D：what can we do
