The luncheon starts with some drinks and snacks at 11:30 am.

11：30开始提供午餐的饮料和点心。

Are you serving lunch now?

你们现在提供午餐服务吗?

The luncheon starts with some drinks and snacks at 11:30 am.

11：30开始提供午餐的饮料和点心。

The delegation arrived in Beijing yesterday.

代表团已于昨曰抵达北京。

Have the American contingent arrived yet?

美国代表团已经到了吗?

Yes. They arrived in Beijing yesterday.

是的，他们昨天已经抵达北京。