When I entered the room, I found Mary ______ at the desk ______ her homework.
Lifting off at sunrise, the hot air balloon goes wherever the windblow.
—Where on earth have they gone? —I have no idea, but I wish I .
When Thanksgiving Day isthe corner, stores and supermarkets are busy with people.
The part in the filmthe man broke down the door made some of the audience give a cry.
More than a quarter of the energyin the United States goes to moving people and goods from one place to another.