A lot of waste from factories and households is__________into the river.

The government should do more to promote__________eco-tourism.

People can’t exist unless there are plants and animals on Earth.

III - Choose the correct relative pronouns in the box to complete the sentences. Some pronouns can be used more than one time.

1.               John’s smartphone, ___________his father gave last week, is very expensive.

'' This tablet will be useful for language learning”, Minh told me.

Minh told me that_______________________________________________________                

II - Rewrite the following sentences so that they have the same meanings as the ones given.

1.               “These measures are strongly supported by environmental groups”, Lan said.

You can use laptops to__________the Internet, download programs and information.

I  - Choose the best option to complete each of the following sentences.

1.               __________is a natural or chemical substance which is used for plants to make them grow well.

Dumping__________waste in the ground causes soil pollution.

John eats a lot of sugary food, so he is overweight.

If               _______________________________________________________ 

This mobile device offers a lot of new applications      ___________are useful for learning English.

The person___________gave a presentation on air pollution on TV yesterday evening is my teacher. 

Lead emissions from car exhausts are an atmospheric__________that can be harmful to people’s health.