根据句意及汉语提示，写出各单词的正确形式，每空一词。
Like China, the UK has a long history. Kings and queens were once its       （统治者）.
Many people have got a cold because the temperature         (下降) a lot several days ago.
When the little boy saw the dog playing wonderful tricks, he began to       (笑) loudly.
To our surprise, there was no salt in the fish. Dad did the cooking a little        (粗心地).
– How       (令人疲倦的) it is to reach the top of the mountain after three hours’ climbing!
-- Don’t care much for that. The view from here is so beautiful.