根据汉语完成句子。
1．我不知道想吃什么东西.
I don't know what I want ___________ ___________.
2．那个男孩正在打篮球.
The boy is ___________ ___________.
3．你多久洗一次澡?
___________ ___________ do you take a bath?
4．火车什么时候出发?
___________ does the train ___________?
5．北京是中国的首都.
Beijing is the ___________ ___________ of China.

参考答案：
1. to eat  
2. playing basketball
3. How often
4. When, leave  
5. capital city

根据汉语完成句子。
1．我不知道想吃什么东西.
I don't know what I want ___________ ___________.
2．那个男孩正在打篮球.
The boy is ___________ ___________.
3．你多久洗一次澡?
___________ ___________ do you take a bath?
4．火车什么时候出发?
___________ does the train ___________?
5．北京是中国的首都.
Beijing is the ___________ ___________ of China.

参考答案：
1. to eat  
2. playing basketball
3. How often
4. When, leave  
5. capital city