Find and correct the mistakes in the following sentences

VII. Find and correct the mistakes in the following sentences. (1pt)
1. He intends staying there for at least three years.                     ………………………………...
2. Minh said that he will visit Da Nang the following summer.  …………………………………
3. Did you enjoy to watch the film?                                            …………………………………
4. Radioactive polluted is very dangerous since it can abnormal growth.  ……….……………………