Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
A、tookWhenworkersareorganizedintradeunions,employersfindithardtolaythem________.
TheTVstation,in________tomassivepopulardemand,decidedtocontinuethesoapopera(肥皂剧).
Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
Forthenewcountrytosurvive,________foritspeopletoenjoyprosperity,neweconomicpolicieswillberequired.
________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
