Câu 1: Lan is doing her homework now
=> what is lan doing now ?
Câu 2: My mother usually go to the market in the morning
=> how often does your mother go to the market in the morning?
Câu 3: Let's meet at 7:00 tonight
=> what time can i meet you tonight ?
Câu 4: I often go camping with my friend at weekend
=> when do you often go camping with your friend?
Câu 5: The bookbook costs 15.000 dong
=> how much does the book cost ?