--- Excuse me, could you tell me where ______ in the group-buying?--- Sure, sir. You can try www.taobao.com.
We had fun ________ the robots do many different kinds of things.
The boss makes the workers ________ long hours every day.
—________ will you come back from your work, Dad?—In about half an hour, dear.
There _______an important meeting this afternoon. All of you should attend it.
There are three ________ students in their school.