根据句意，用括号中所给单词的正确形式填空，每空一词。
1. So far, I haven't made a (decide) about where to go for the coming summer holidays.
2. This year it has rained so (heavy) in South China that lots of problems are caused.
3. When we walked past the playground yesterday, we found him (lie) on the grass, enjoying
the sunset.
4. Jack is busy preparing for a party to celebrate his sister's (twelve) birthday. He wants to give
her a big surprise.
5. — On April 14th, an earthquake hit Yushu and destroyed its (beautiful) completely.
— It's a great pity.