21．When Astrita came ，he knew that he would one day get into Guinness Book．third in 24-hour bicycle marathon in 1978
A．the；a B．不填；不填 C．the；the D．不填；a
22．—Is it all right if I smoke here?
— ．sir．This is a non-smoking section．
A．No way B．Go ahead C．Better not D．As you please
