EX1 :

1. The event was attended by thousands of people last year .

2. Atternative sources of energy will be developed in the near future .

CT : S+ be + VPII + ( by O ).

EX2 :

1. How often is this music festival hold ?

2. When is the Quan The Am festival hold in Da Nang, Viet Nam ?

3. Why does Nam have a small carbon footprint ?

1 The event was attended (by thousands of people)

( câu bị động thì quá khứ đơn - last year)

2 Alternative sources of energy will be developed in the near future

( câu bị động thì tương lai đơn - in the near future )

III

1 How often is the music festival held ?

2 When is the quan The Am festival held in Da Nang, Viet Nam

3 Why does Nam have a small carbon footprint?