班長的英文是Monitor。

解釋：

monitor 英[萴RnjtY(r)] 美[萴ɑ:njtY(r)]

n. 監測儀; 顯示屏，螢幕; [計] 顯示器; 監控人員，班長;

vt. 監督; 監控，監聽; 蒐集，記錄; 測定;

vi. 監視;

[例句]他當選為班長。

He was elected monitor.

老師正在跟班長談話。

The teacher is talking to the monitor.

他是班長，有很多社會工作。

As a monitor, he has many duties outside his study.

班長的發言和幾位同學的插話都很有意思。

The monitor"s speech and the occasional remarks of some classmates were all veryinteresting.

他將成為他們的好班長。

He will make a good monitor for them.