Section1
上期复习
Like an argument between parents distresses children, the angry confrontation between the managers made others in the room uncomfortable.

面对, 对质, 对抗

Section2  本单元复习

Just as research helps scientists make educated guesses, the information about the problem led them to make several intelligent deductions about its cause.

(a) chemicals         (b) more money            (c) conclusions                  (d) none of the above

答案:(d) none of the above