21．Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience.
A．/；the B．/；an C．an；an D．the；the
22．Mary wanted to travel around the world all by herself，but her parents did not ________ her to do so.
A．forbid B．allow C．follow D．ask
23．As the busiest woman in Norton，she made ________ her duty to look after all the other people’s affairs in that town.
A．this B．that C．one D．it
24. Chongqing and Wuhan are among the most important cities in China ________ their size and population.
A．in favor of B．in case of C．in view of D．in terms of
25．—Do you feel like ________ there or shall we take a bus?
—I’d like to walk.But since there isn’t much time left，I’d rather we ________ a taxi.
A．walking；hire B．to walk；hire
C．to walk；hired D．walking；hired
26. The police ________ him of stealing a car and put him into prison.
A．warned B．charged C．accused D．threatened
27．It is impossible to treat this matter ________ in a short lecture.
A．in short B．in detail C．in brief D．in addition
28. Bill suggested ________ a meeting on what to do for the Shanghai Expo during the vacation.
A．having held B．to hold C．holding D．hold
29．The famous actor keeps fit by ________ for an hour every morning.
