You are late for work again, Miss Jane. You ___ here half an hour earlier.
A．must be
B．could have been
C．may have been
D．should have been

Peahens at Whipsnade Zoo show a preference for
A．the most dominant male in a group
B．the biggest and strongest male
C．the male which displays most often
D．the male with the finest feathers

The main purpose of this plan was to ______.
A．cut down the gas supply
B．eliminate the long lines at gas stations
C．result in the recent oil crisis
D．buy gas only in odd-numbers or even-numbers

Personally the author __ Internet dating.
A．agrees on
B．approves of
C．believes in
D．opposes

__ is prohibited near gasoline.
A．No smoking
B．Smoking
C．Working with electric power tools
D．A wet extension cord

How did Alfred Russel Wallace's view of peacocks differ from that of Darwin？
A．He thought that a peahen's choice of mate was practical.
B．He believed that animals could experience emotions.
C．He believed animals appreciated beauty for its own sake.
D．He believed that the peacock's train must have a protective function.