As group leader, you should take charge.

你身为组长，应当负起责任来。

He is a capable group leader.

他是个能干的小组长。

They made me the group leader.

他们选我当小组长。

We arrange a suite for the group leader.

我们为团长先生安排了套间。

We got behind him to be our group leader.

我们赞成当我们的组长。