I like Beijing very much. 我非常喜欢北京。

Have you been to the Palace Museum? 你去过故宫博物馆吗？

Yes. It's one of the most beautiful places I have ever seen. 是的。那是我见过的最美丽的地方之一。

What places have you visited in Beijing? 你去过北京的哪些地方？

I have been in Beijing for half a year.  我在北京半年了。

What places have you visited in Beijing?  你去过北京的哪些地方？

I've visited the Summer Palace, the Palace Museum and the Temple of Heaven. 我去过硕和园、故宫博物馆，还有天坛。