11. Mr Jones was very generous about overtime payments. I was working for him. (relative pronoun with preposition)  Mr Jones________________________________________________________

$11.$ $Mr.$ Jones was very generous about overtime payments. I was working for him.

⇒ $Mr.$ Jones, who was working for him, was very generous about overtime payments.

Dịch: Ông Jones, người đang làm việc cho anh ta, rất hào phóng về việc trả tiền làm thêm giờ.

$G/T$: Điền ''who'' vì đây là đại từ quan hệ chỉ người.