c1, Where do they go in the summer holidays?
c2, where are you staying?
c3, Why doesn't Mai stay in the water very long?
c4, Which is Minh plays with on the beach?/ Where does Minh play with sand?
c5, Where is Hoang going to?
c6, What is Lan and Chi's favorite pastimes?
c7, What does Nam like? / What is Nam's hobby?
c8, Who plays the violin very well?
c9, What should I do today?
c10, Where does Chi often go?