1.
A. activity [æk'tiviti]
B. enjoyable [in'dʒɔiəbl]
C. economy [i:'kɔnəmi]
D. difficulty ['difikəlti]
-> D
2.
A. environment [in'vaiərənmənt]
B. ecology [i'kɔlədʒi]
C. intervention [,intə'ven∫n]
D. community [kə'mju:niti]
-> C
3.
A. Vietnamese [,vjetnə'mi:z]
B. contribution [,kɔntri'bju:∫n]
C. conservation [,kɔnsə:'vei∫n]
D. concentrate ['kɔnsntreit]
-> D
4.
A. alternative [ɔ:l'tə:nətiv]
B. competitive [kəm'petitiv]
C. conservative [kən'sə:vətiv]
D. inexpensive [,iniks'pensiv]
-> D
5.
A. economical [,i:kə'nɔmikəl]
B. ecological [,ikə'lɔdʒikəl]
C. environmental [in,vairən'mentl]
D. unavoidable [,ʌnə'vɔidəbl]
-> C
6.
A. eliminate [i'limineit]
B. concentration [,kɔnsn'trei∫n]
C. eventually [i'vent∫uəli]
D. inhabitant [in'hæbitənt]
-> B
# Chúc học tốt #