bài 1: đặt câu hỏi cho câu trả lời :
a)the dentist takes care of people's teeth
=>who.........................................................
b)she is sad because her cat is dead
=>why.........................................................
c) they travel around the workd by plance
=> how........................................................
d)we are going to Nha Trang for a month
=> how long ...............................................
e)she will come here at 10 oclock
=> what time..............................................