Phong : Where were you last summer?
Hoa : I was at the seaside?
Phong : Where did you go?
Hoa : I went Ha Long bay
Phong : What did you do?
Hoa : I took  a boat trip


Phong : What was trip like?
Hoa : It was wonderful

S + was/were + O
S + V_ed/v_qk + O

Phong: Where were you last summer?                                     S+was/were+O

Hoa : I was at the seaside?                                                       S+V_ed/v_qk+O

Phong : Where did you go?

Hoa : I went to Ha Long Bay 

Phong : What did you do?

Hoa : I took a boat trip

Phong : What was trip like?

Hoa : I was wanderful.