Ex4:

1. Cows are fed in Ba Vi

2. These hopitals were built during yhe war time.

3. A new skirt was made by  Liên yesterday

4. Flowers  are being planted in Da Lat.

5. Some fruit trees has just been planted by Mr. Bao

Ex9:

1. Will visit

2. Will buy

3. Will you go

4. Won't plant

Ex4 ; change the following sentences into the passive voice

1. People feed cows in Ba Vi

⇒ Cows are fed in Ba Vi

2. People built these hospitals during the war time

⇒ These hospitals were built during the war time

3. Lien made a new skirt yesterday.

⇒ A new skirt was made by Lien yesterday

4. People are planting flowers in Da Lat

⇒ Flowers are being planted in Da Lat

5. Mr Bao has just planted some fruit trees

⇒ Some fruit trees have just been planted by Mr Bao

Ex9 : give the correct form of the verbs in brackets

1. I will visit Ha Long Bay next summer .( visit)

2. They will buy a new car next month (buy)

3. Will you go to the seaside tomrrow ?(go)

4. Mr Cuong won't plant more trees next sping ( not plant)

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