练习题：
1. The book __________ (write) by him last year.
2. A new school __________ (build) in our town next year.
3. Many trees __________ (plant) in the park every spring.
4. English __________ (speak) all over the world.
5. This song __________ (sing) many times by now.
参考答案：
1. was written
2. will be built
3. are planted
4. is spoken
5. has been sung
在做这些题目时，要注意根据句子的时间状语选择合适的时态，并且确定主语和动作之间的关系。被动语态通常用于强调动作的承受者，而不是执行者。希望以上练习能帮助大家巩固被动语态的知识点！如果还有疑问，可以随时提问哦。
