English translation: 1 Advertising is a highly competitive industry. Universities compete fiercely for good students. My knowledge of this industry is limited.

Hello, I'm glad to answer your question. The correct answer is,

1: The advertising industry is a competitive industry.

2. The competition among good students in universities is fierce.

3. I have limited knowledge of this industry.

4: Food can be delivered to your room.

5: It takes me 45 minutes to go to work in the morning.

Shanghai is one of the most densely populated areas in China.

7. The patient feels good after operation.

I hope I can help you. If you don't understand anything, please consult and adopt it.