(a) facility
(b) denial
(c) coincidence
(d) trespasser
247.adj. reliable; trustworthy; dependable
(a) commercial
(b) aggregate
(c) robust
(d) credible
248.v. to substitute for; to return something to a particular position or location
(a) scan
(b) replace
(c) pad
(d) leave
249.adj. enduring; lasting; continuing; leftover; remaining
(a) persistent
(b) intensive
(c) severe
(d) residual
250.n. bed covering; quilt
(a) size
(b) special
(c) blanket
(d) downtown
正確答案:ddbdc