Read the following sentences

Read the following sentences. Write C beside correct sentences and I beside the incorrect sentences and make all necessary corrections.
 

11. The teacher recommended us to study the chapter carefully before the exam.

12. The students postponed preparing for the exam until the night before.

13. Helen promised taking the library book back.

14. The teacher insisted for the students arriving on time for class.

15. Paul hates getting up early in the morning.

16. The janitor started to clean the floor after everyone left.

17.The rain prevented the children from go to the park.