Tom can run faster than any other kid in the school _______ he is only 12 years old.
We really don’t know _______. Could you help us?
—Will you please ________ do that? —OK, I won’t.
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.