Tom was too wet behind the ears to be in charge of such a difficult task

* Hướng dẫn giải

Chọn đáp án A

- full of experience: đầy kinh nghiệm

- lack of responsibility: thiếu trách nhiệm

- without money: thiếu tiền

- full of sincerity: đầy sự chân thành, rất chân thành

- wet behind the ears: young and without much experience: chưa có kinh nghiệm, quá non nớt, miệng còn hôi sữa

E.g: He was still wet behind the ears.

Do đó: wet behind the ears  full of experience