... 1818 was… a. decreased crop and livestock production b. volcanic ash in the atmosphere ĐỀ THI THỬ TN NĂM 2011 - SỐ 01 Chọn phương án ( a hoặc b, c, d) ứng với từ có trọng âm chính nhấn vào âm ... is a ( 47)… time to get things done. You might enjoy ( 48)….to music ( 49)….you revise, but this can be ( 50)… Can you really concentrate (51) ……two things at once? So think ( 52) ….you turn ... is a ( 47)… time to get things done. You might enjoy ( 48)….to music ( 49)….you revise, but this can be ( 50)… Can you really concentrate (51) ……two things at once? So think ( 52) ….you turn...