- Don’t boys. Keep working on and you will be successful. - Thank you Mr Zhu. We’ll try

问题补充：

- Don’t , boys. Keep working on and you will be successful.

- Thank you, Mr Zhu. We’ll try our best.

A. put up

B. turn off

C. work out

D. give up.

答案：

A. put up

B. turn off

C. work out

(答案→)D. give up.

解析：put up提供，建造，举起； turn off关闭； work out算出，实现；give up.放弃，交出。句意：不要放弃，孩子们。坚持继续努力，你们就会获得成功。——谢谢你，朱老师。我们会尽最大努力地。结合语境可知选Ｄ。