271.v. to bear witness; to declare under oath; to attest
(a) testify
(b) salvage
(c) file
(d) list
272.v. to set apart an additional amount of space or money for security
(a) locate
(b) foster
(c) margin
(d) award
273.v. to bill; to charge
(a) rebound
(b) aggregate
(c) manage
(d) invoice
274.v. to cause to be acquainted; to accustom; to make something well known; to publicize
(a) store
(b) cushion
(c) familiarize
(d) lack
275.v. to rub off; to remove totally; to delete
(a) know
(b) pose
(c) groom
(d) erase
正确答案:acdcd