39문제 중에 9개 틀렸어요. ㅎㅎ

아래 문제들에 대한 해설이자세히 안 나와 있어서 왜 틀렸는지 이유를 알아야될 것 같습니다. 아시는 분은 답변 좀 부탁드립니다. ㅠ.ㅠ

52p-23 The survey recently ___ that the impact on the environment from the manufacturing plant is minimal

(a)determing (b) determined

(c) to determine (d) will determine.

52p-32

Many corporate leaders ___ the construction of manufacturing factores in Latin america to elevate employment rates.

(a) to recommend (b) were recommending

(c) recommends (d) are recommended

53p-32 Tintint Electronics ___ their production goods after studying sales figures at the end of each quarter

(a) revising (b) revises

(c) is revised (d) to revise