请帮我把几个英语句子改成被动语态

请帮我把几个英语句子改成被动语态
1.Does the doctor examine the children every year?
2.I taught him how to read the English words?
3.She gave me a very nice present on my birthday
4.He will introduce me to his friends
5.Charles Dickens wrote this novel
6.You should't leave the baby home.
7.When will they hold the next World Expo?
8.How often do you tidy your room?
9.You mustn't break the rules.

很高兴能够在这里回答你的问题,填写
1 Are the children examined by the doctor every year?
2 He was taught how to read the English words by me.
3 I was given a very nice present by her on my birthday.
4 I will be introduced to his friends by him.
5 This novel was written by Charles.
6The baby shouldn't be left home by you.
7 When will the next World Expro be hold by them?
8 How often are your room tidied by you?
9 The rules mustn't be broken by you.

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