Choose the correct answer to each of the following questions. Write your answer (A, B, C, or D) on your answer sheet. Questio

Choose the correct answer to each of the following questions. Write your answer (A, B, C, or D) on your answer sheet.
Question 13: Friends of the Earth is concerned about the ______ of the natural environment.
A. conservative B. conserve C. conservational D. conservation
Question 14: Math and Literature are two of the ______ subjects in most examinations in Vietnam.
A. additional B. selective C. compulsory D. optional
Question 15: If I were a millionaire, I ______ a school for poor children.
A. build B. will build C. would building D. would build
Question 16: Auld Lang Syne is a song ______ is sung on New Year’s Eve in Britain.
A. who B. whom C. which D. it
Question 17: Scientists are looking for ______ ways to reduce energy consumption.
A. effectively B. effect C. effective D. effectiveness
Question 18: This school bus always comes ______ 6 o’clock ______ the morning.
A. at/ in B. in/ in C. on/ in D. to/ on
Question 19: Son Dong cave is recognized as ______ cave in the world by British Cave Research Association.
A. the largest B. the larger than C. the most large D. the large