800 câu trắc nghiệm Điền từ Tiếng Anh có đáp án - Phần 13

In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)_________ soon became part of the folk tradition.

14/35

In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)_________ soon became part of the folk tradition.

which

this

who

that

Giải thích

A là đáp án đúng