When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
B
暂无解析
The wealth of a country should be measured ________ the health and happiness of its people as well as the material goods it can produce.
________ with the size of the whole earth, the highest mountains do not seem high at all.
Sixty per cent of television viewers chose him as their _______ actor.
TheTVstation,in________tomassivepopulardemand,decidedtocontinuethesoapopera(肥皂剧).