我的公寓在伦敦东部。

My flat is in ___the ___east of London.

威尔士西部多山，但东部平坦。

The west of Wales is mountainous, but ___the ___east is flat.

你可以参观城市东部，看看旧港口。

You can visit ___the ___east of the city to see the old port.