问题详情：
用所给词的适当形式填空。
1. —What_________ the twins_________ (do)when their parents got home yesterday?
—They were cleaning the house.
2. There are two_________ (pocket)in your jacket. You can put something in them.
3. —_________they_________ (have)a tea party last night when I rang?
—Yes, they were.
4. You should stop_________ (drink)coffee. It’s time to work.
5. We happened_________ (meet)the headmaster on Mount Tai last month.
【回答】
; doing 2. pockets 3. Were; having
4. drinking 5. to meet
知识点：语法填空
题型：完成句子
