1. It can't be achieved in a short period of time.
2. The gymnasium tends to be busy at around 6pm.
3. This place is not safe. You'd better stay away frow it.
4. In terms of sales, it is one of the five biggest supermarkets in this region.
5. This room not only serves as bedroom but also living room.
6. The production department is in charge of monitoring the progess of this project.
7. The manager was involved in a marketing research last month.
8. Nowadays, most big companies promote their products and services by using internet.
PS: Your video uploaded doesn't work.