Bill has given up his job and gone back to college.
(A) let off
(B) given up
(C) passed up
(D) withdrawn
why can't the answer use passed up ?
Sending a piece of mail "special delivery" costs about fifteen times as much as sending it "regular delivery
(A) mails
(B) a mail
(C) a piece of mail
(D) pieces of a mail
why can't the answer use a mail ?
I was just about to go out when you telephoned
A) around
(B) about
(C) thinking
(D) planned
why can't the answer use thinking ?