Question

---Mum, can we go to the art museum tomorrow?

---Sure．But first we should find out ______．

1. A.
   what can we do
2. B.
   where we can go
3. C.
   how can we go there
4. D.
   if it will be open

Answer 1

D
宾语从句的用法。宾语从句的语序为陈述语序，根据上下文可知首先我们应该找出它是否开放。因此选D。