用所給單詞把兩個句子合并成一個句子
1. Tom arrived at his school. He started his lessons.(after)
    ___________________________________________.
2. It's December. It's summer in Australia. (although)
    ___________________________________________.
3. The boy has a bad temper. We'd better not talk to him. (and)
    ___________________________________________.
4. She was laughing all the time. Everyone thought it was funny. (that)
    ___________________________________________.
5. Summer is hot here. Winter is cold. (but)
    ___________________________________________.
1. After Tom arrived at his school, he started his lessons.
2. Although it's December, it's summer in Australia.
3. The boy has a bad temper, and we'd better not talk to him.
4. Everyone thought it was funny that she was laughing all the time.
5. Summer is hot here but winter is cold.
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