英语提问:每个句子中都有一处错误,请找出来

英语提问:每个句子中都有一处错误,请找出来
1.His first question was if Holmes had arrived yet.
2.I will invite who wants to take part in my birthday party.
3.Can you tell me how I should do next?
4.I wonder how you think of the composition written by my child.
5.Nobody told me what has happened before I come in.
6.The teacher told us that the Pacific Ocean was the largest ocean in the world.
7.I think we don't need to waste much time on it.
8.Do you think possible that he will finish his task in ten minutes?
9.Can you tell me where is our teacher?
10.The reason why Hollywood is a natural place for making movies is why the sun shines there every day.