Question 1. Choose the word whose main stressed syllable is different from that of the others. * 1 điểm A. industrial B. environment C.agriculture D. responsible uestion 5: A nuclear reactor releases ___________ which is dangerous to the environment. * 1 điểm A. radiation B. heat C. energy D.carbon dioxide Question 6: Solar energy can be changed _________________ electricity. * 1 điểm A. in B. to C. into D. for Question 7: Oil, coal and natural gas are ____________ fuels made from decayed material from animal or plants. * 1 điểm A. unleaded B. smokeless C. solid D. fossil Question 8: Human beings are ___________________ for the changes in the environment. * 1 điểm A. account B. faulty C. blame D. responsible Question 9: The speech _____________________ we listened last night was information. * 1 điểm A. to which B. for which C. to whom D. whom Question 10: _________________ aren’t effective anymore because insects have become resistant to them. * 1 điểm A. Fertilizer B. Pesticides C. Herbicides D. Composts