关井时，在任何情况下，其关井套管压力都不允许超过最大允许关井套压。（）
A、错；
B、对。
参考答案：B
句型转换。
1. It's time for supper. (同义句)
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2. She is often late for school. (反义句)
3. We are learning to fly a kite. (对划线部分提问)
4. I think you want to go home. (否定句)
5. Lucy, do your homework. (用now改句)
回纹
