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18 The main cause of pollution and global warming is the ________ gases from cars and other vehicles.
A peaceful B quiet C harmful D fresh

19 When ice caps ________ sea levels will rise and floods ________ more often.
A melt / will happen B is melting / happen C melts / will happen D melting / happening

20 We will turn off all the lights ________ we leave the classroom. This will help save electricity.
A before B after C as soon as D while

21 Bengal tigers continue to suffer from serious ________. Humans are destroying their natural homes.
A habitat loss B pollution C climate change D illegal hunting

22 The exhibition on the illegal pet trade ________ at the City Hall on July 8. I ________ the organiser to book a ticket this afternoon.
A will take place / call B is going to take place / calling C takes place / am going to call D is taking place / I am calling

23 Forest firefighters must be ________ because they face danger to put out fires and save people.
A caring and careful B brave and careful C creative and caring D creative and kind

24 Kate: "What are you going to do this summer?" - Andy: "
A I'm going to volunteer in a national park.
B If I can't come, there will no one to help in the national park.
C That's a good idea! I will volunteer in a national park.
D It's great. The national park is calling for volunteers.

Choose the underlined part (A, B, C or D) that needs correcting.
25 If we will save water, more people will have fresh water to use.
A B C D

26 We are going to cleaning up the beaches after the Tết holiday.
A B C D

Choose the word that has the CLOSEST meaning to the word in bold.
27 It is really hard for these gorillas to live in the new environment in this national park.
A habitat B nature C landscape D wildlife

Choose the word that has the OPPOSITE meaning to the word in bold.
28 We must try our best to protect lemurs. They are suffering from illegal hunting.
A keep B C destroy D rescue

Give the correct forms of the words in brackets.
29 Many _______ groups are working hard to help save our planet. (ENVIRONMENT)
30 Students can learn _______ practices and how to collect data when they visit the aquarium next week. (SAFE)