单句改错。
1. I don't know if to help him or not. ________
2. She can't help cleaning the house because she's busy making a cake. ________
3. We all hope you to make rapid progress. ________
4. The results of the research are to publish soon. ________
5. It is too heavy for me to lift it. ________
6. It's awfully good for you to come and meet us. ________
7. These are very good books for your children to be read. ________
8. He did what he could help me with my physics. ________
9. Let's find a big bag to put the things. ________
10. It would be easier to climb over the mountain than going round the valley. ________