I could do with a cup of tea.

　　我需要一杯茶。

　　Would you like tea or coffee?

　　你喝茶還是喝咖啡？

　　Let him get his own cup of tea.

　　讓他自己去倒茶。

　　I'll put the kettle on for tea.

　　我來(lái)燒壺水好沏茶。

　　Do you take sugar in your tea?

　　你的茶水里放糖嗎？