21. _______ (W) word came that three Chinese astronauts had been successfully sent into ______ space.
A. The; a B. 不填；不填 C. A; 不填 D. 不填；the
22. Any company which wants to succeed in the market must maintain its good _______.
A. position B. regulation C. recognition D. reputation
23. High-heeled shoes should be banned from the workplace ________ health and safety reasons, according to the trade union leaders.
A. other than B. except for C. due to D. apart from
