5. The repairperson could not find the specific problem ----- had caused the computer to crash.

A. how

B. whom

C. what

D. that

6. According to the sales director, Ms. Elms is ----- to one of our subsidiaries to collaborate with its sales team.

A. delivering

B. visiting

C. transferring

D. replacing

7. We need to conduct extensive background research on the firms from ----- we received bids.

A. which

B. where

C. that

D. when

8. The director decided to delegate some of the work to a subcontractor after his employees ----- help with the project.

A. inquired

B. requested

C. asked

D. insisted

9. Employees ----- to transfer to the new branch office will receive reimbursements for all moving expense, as well as a bonus.