21．Charles went to Austria to learn the piano in________ 1980s，when he was only in________ teens.
A．the；the B．/；/ C．/；his D．the；his
22．I took the tablets for the headache but they didn’t have any ________.
A．cause B．effect C．harm D．work
23．The weather was bad and the food dreadful.Altogether the holiday was very ________.
A．disappointing B．hopeless C．disappointed D．unique
24．The manager said，“We are making it impossible for anyone to ________ an excuse to avoid work.”
A．put up B．take up C．dream up D．give up
25．We should ________ work ________ pleasure.
A．join；with B．combine；with
C．connect；and D．link；to
26．He went to the badminton club ________ during his school days.
A．in no time B．in time C．at all time D．at times
27．People who have the most knowledge will ________ the development of the society.
A．play a role among
B．take part in
C．play an important part for
D．play a leading role in
