Câu số 11:  

Why does the writer use the example of the aeroplane?

Câu số 12:  

What does the writer say about the future of communication?

Câu số 13:  

What does the writer say about space solar power?

Câu số 14:  

The best title for the article would be             .

Câu số 15:  

What does the passage mainly discuss?

Câu số 16:  

The word “this” in the first paragraph refers to .

Câu số 17:  

It can be inferred from the second paragraph that advertisers must .

Câu số 18:  

According to paragraph 2, market research includes              .

Câu số 19:  

The author implies that the advertising industry requires              .

Câu số 20:  

According to the passage, most advertising used to be directed at            .