1.______the students think it their duty to study hard has laid the foundation for the university's high reputation.
2. It has always puzzled me______ theold man tied a red silk ribbon on the young tree in his courtyard.
______the students think it their duty to study hard has laid the foundation for the university's high reputation.
It has always puzzled me______ the old man tied a red silk ribbon on the young tree in his courtyard.