We must ______ that the experiment is controlled as rigidly as possible.
A、assureA
暂无解析
Thestudentfoundthenovel_______.Itprovidedhimwithsomuchinformationaboutthesubject.
It________asashocktorealizethatIwasnotaloneintheroom.
The TV station, in ________ to massive popular demand, decided to continue the soap opera(肥皂剧 ).
________somanypeopleintheUnitedStatesbeenoutofworkastoday.
It was three British sportsmen who ________ banned drugs.
