用括号内所给动词的正确形式填空。
1. —I phoned you yesterday morning, but you were not in.
—We _______(fish) by the river.
2. _______(make) sure that there are no mistakes, he will check the paper carefully.
3. Is the washing machine I have used for a long time worth _______(fix)?
4. There _______(not be) much snow here in the past three years.
5. I don't know if we _______(show) around the History Museum tomorrow afternoon.
