大輔、ポール、綾香の会話を聞いて、空所に適切な語を入れましょう。
Paul
学習方法
Reading their messages, you can learn ①( ) expressions in English. 利点
Written online, their messages can be read anywhere with your ②( ).
Ayaka
学習方法
Watching it, you can improve your ③( ) skills. 利点
Spoken in ④( ) English, the program is easy to understand.