Why was the couple that the writer met smiling as they ran down the street?

30/40

They had explored a tunnel without being caught.

They had discovered a dangerous tunnel below.

They had discovered a tunnel below.

They were able to replace the icon cover.

Giải thích

Đáp án đúng: A

Giải thích: Dựa vào thông tin:

- “The great avenues of Paris are silent, and the shops are closed” => không ai để ý họ

- “The couple had been exploring the tunnels beneath the city”