用括号内所给单词的适当形式填空。
1. We _____ (plant) some flowers in the garden last week.
2. A: I _____ (lose) my purse!
B. Bad luck! When _____ you _____ (lose) it?
A: I _____ (lose) it last night.
3. He _____ (come) back home, he _____ (watch) TV now.
4. David _____ (finish) his homework just now.
5. The monkeys are full, because we _____ (feed) them.