世界贸易组织是一个（）。
A、有关关税及贸易政策的多边协定SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
中国共产党在过渡时期总路线的主体是____________。
Thestudentfoundthenovel_______.Itprovidedhimwithsomuchinformationaboutthesubject.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
