用括号内所给词的适当形式填空。
1. The old man _______(be)ill and went to see a doctor.
2. We ________ (have) a party last night.
3. We __________ (visit) the museum and went home.
4. —What _______ (be) the students like? 
—They were very friendly.
5. He often _______ (have) supper at home.
6. — ______ he _______ (have) lunch at nine?
—No, he didn’t.
7. They _________(buy) a guitar yesterday.