답을 모르는 문제들 이거든요ㅜㅜㅜ 해설지도 없어서 난감합니다...

131. Along with some senior managers, CFO Dave Browing ______ responsible by shareholders for the company's poor performance.

(A) was holding

(B) has held

(C) was held

(D) will be holding

132. Banking on the incredible success of its first digital music player, Diva Electronics launched a second model of the _____ product one year later. 요 문제는 앞에 Banking on~~player, 까지 해석이 깔끔하게 안 되고 답도 아리까리 합니다.

(A) same

(B) quickest

(C) level

(D) even

134. The branch managers have to stay vigilant as the CEO is fond of making unannounced ______ throughout the year. 빈칸이 명사형인건 아는데 visits가 명사로 쓰이는지 visiting이 명사로 쓰이는지 모르겠더라구요.

(A) visits

(B) visiting

(C) visited

(D) visitors

136. To accommodate diners with food allergies, cooks may ______ one ingredient for a similar component that is known not to trigger a reaction.

(A) substitute

(B) relieve

(C) sustain

(D) modify

substitute를 쓰자니 substitute A for B로 인해 해석이 이상해져 안 맞는 것 같더라구요...

139. During his presentation, Mr.Kwan made rather ambitious sales projetions, ______ the potential investors found to be overly optimistic.

(A) whom

(B) when

(C) which

(D) that