In post and beam construction, vertical posts may be spaced up to ___ inches

Patients receiving hemodialysis must go to a special center ________ time(s) a week for two to three hours at a time

a. one b. two c. three d. four

A(n) ________ presents one of the most difficult challenging communication problems.

A. sick patient B. terminally ill patient C. hypochondriac patient D. angry patient