Whenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
Thewealthofacountryshouldbemeasured________thehealthandhappinessofitspeopleaswellasthematerialgoodsitcanproduce.
Theassociationis________toraisingfundstohelptheblind.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
________,Johnhasbeentoseveralforeigncountries.
Seniormembersofthestaffcompetedeagerly________thepositionofsalesmanagerinthecompany.