The CEO presided over the annual meeting.

CEO（Chief Executive Officer，首席执行官）主持了年度会议。

He presided over the board meeting with confidence.

他自信地主持了董事会会议。

The judge presided over the court case with fairness.

法官公平地主持了庭审。

The emperor personally presided over the ceremony to offer sacrifice to Heaven.

皇帝亲自主持了祭天仪式。

Successive governments have presided over selling green spaces.

历届政府都在主政期间出售绿地。

Was presided over by somebody

由某人主持

The ceremony presided over by a housewife.

其仪式由家庭主妇主持。

I think she had presided over what to do?

我在想，她们能主持什么呢？

I think she (he) had presided over what to do?

我在想，她（他）们能主持什么呢？

The city council is presided over by the mayor.

市政委员会由市长领导。