It’s also very (2) ________ to know that you are not wasting your time and are helping people who (3) ________ help.

satisfying

Kiến thức: Nghe hiểu

Giải thích: It’s also very (2) ________ to know that you are not wasting your time

Thông tin: It’s also very satisfying to know that you are not wasting your time

(Cũng rất hài lòng khi biết rằng bạn không lãng phí thời gian của mình)

Đáp án satisfying.