26 Millions of people are using cell phones today. In fact, in many places it is actually considered
unusual _____use one.
(A) not (B) don’t (C) to not (D) not to
429. There has been a _____ change in the staff’s attitudes toward the manager. They first admired him, then ignored him and now they turn their backs on him.
(A) vacant
(B) virtuous
(C) valuable
(D) visible
6 Sometimes a social interaction with a(n) _____ rather than a stranger brings a better mood.
(A)acquaintance
(B)dominance
(C)performance
(D)significance