Because English is the global language, the language used, and used all over the world. Specifically, the time to communicate with foreigners, we will use English as the medium to match.
Because English is the language used and the universal language of the world. Especially when communicating with foreigners. We will use English to communicate, synchronize.
Because English is the language used and the language used all over the world. Especially when communicate with foreigners. We will use English as a media of the same.