【推荐1】当时，他们请求再给三天时间。
At that time, they ____________ for another three days.

【推荐2】有时，我们甚至需要花时间来导入一个请求。
Sometimes we even need to spend time _________ into a _________.

【推荐1】你过去经常弹钢琴吗？
__________________ play the piano?

【推荐2】过去我们通过书信、电话来保持联系。
We used to   ___________________________________ each other by letter and telephones.

【推荐3】Rewrite the following sentences as required（根据所给要求, 改写下列句子）
1. David ate four hamburgers for dinner yesterday.（改为一般疑问句）
__________ David ___________ four hamburgers for dinner yesterday?
2. They did some sports last week.（改为否定句）
They ____________ ____________ any sports last week.
3. My brother often got up late, but now he gets up early.（保持句意基本不变）
My brother __________ __________ get up late, but now he gets up early.
4. We should drink eight glasses of water every day.（对划线部分提问）
How _________ water ___________ we drink every day?
5. They played football there yesterday.（对划线部分提问）
___________ __________ they do there yesterday?