Siberian Tigers ________ and killed at such a speed that they will disappear from the earth in the near future.
A thief was found ________ the house and steal the pictures last night.
—What about putting some pictures into the report? —A picture is worth a thousand words.
Buses have routes. They _________ and _________people at different places on the routes.
The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.
__________ the students, the teacher came into the room smiling.