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.