Ⅰ. 句型转换
1. It is impossible that a child can lift such a heavy box.
→It is impossible for a child to lift such a heavy box.
2. It happened that you had known each other before.
→You happened to have known each other before.
3. The progress which will be made soon is of great importance.
→The progress to be made soon is of great importance.
4. We were advised that we not go outside in such a terrible sandstorm.
→We were advised not to go outside in such a terrible sandstorm.
