Ken and Tom are high-school students. They m...

Câu hỏi: Ken and Tom are high-school students. They meet each other at a gallery but Ken is in a hurry.____________   Ken: “I’ve got to go, Tom. So long”             Tom: “So long, Ken. And _______.”

A. be careful                            

B. take care                    

C. don’t hurry               

D. don’t take it seriously