When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
A、tookB
暂无解析
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
Iwon't________thosechildrenmakinganoiseinmyhouse!
Forthenewcountrytosurvive,________foritspeopletoenjoyprosperity,neweconomicpolicieswillberequired.
Thestudentfoundthenovel_______.Itprovidedhimwithsomuchinformationaboutthesubject.
Theboyranoutoftheclassroomwithouttheteacher's_______.
