----Thank you for hclping me with my homework.----- .
---There are many volunteers ______ are helping the children in Sichuan.--- And most of them are college students.
---If there are ______ people driving , there will be ______ air pollution.--- Yes, the air will be fresher.
--- I don’t think teenagers should drive cars.--- _______. They aren’t serious enough.
--- Morning, class! Good luck to all of you in the exam!--- Morning, teacher. ________.
There ______ a group of people _______on the beach.