阅读下面短文，根据短文内容回答下面问题。
Li Mei's friends sent her some postcards from different countries.
Dear Li Mei,
I got to the UK two days ago. On my first day I went to Buckingham Palace (白金汉宫). Yesterday
I walked around the British Museum. It's very big and my legs were tired, but I saw some great things!
Love,
Xiao Jian
Dear Li Mei,
I am in Australia. It's winter for you,but it's summer here. Every morning I go swimming in the warm
sea (海洋), then I go to Chinese restaurant. In the afternoon I walk round shops and buy presents (礼物).
Love,
Luo Ying
Dear Li Mei,
I am in San Francisco. My uncle met me at the airport. Yesterday we did a lot of sightseeing and took
a lot of photos. I bought some clothes. Next week we are going to Hollywood. I'm having a very good time.
Best wishes,
Peng Hui
Dear Li Mei,
I am now on vacation in South Africa. It is very hot. I went to national park and saw lions and elephants.
This is a wonderful country.
Yours,
Li Lan
1. Xiao Jian saw some great things in ___________.
2. It's ___________ in Australia.
3. Peng Hui went sightseeing in San Francisco with his ___________.
4. Peng Hui is going to ___________ next week.
5. Li Lan saw ___________ in a national park.