用might, may, probably, because, so或but完成句子。
1. It's warm in the day,______it______be cold in the evening.
2. Bring your swimsuit,______you ______ want to swim in the sea.
3. It______rain from time to time in spring, ______we'd better take a raincoat.
4. Buy a good map______you're______lost in a big city.
5. It______be a storm,______they have to stay at home tomorrow.
6. We______go to Xi'an for our holiday,______it's an interesting city.
7. You don't study hard, ______you______fail in this exam.
